Home / 77,840.10-116,760.23-21,680.32

Finding the Fourth Proportional to 77,840.10, 116,760.23 and 21,680.32

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Solution

The fourth proportional to 77,840.10, 116,760.23 and 21,680.32 is: 32,520.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,840.10 : 116,760.23 = 21,680.32 : x
  2. Step 2: Convert to fraction form
    77,840.10/116,760.23 = 21,680.32/x
  3. Step 3: Cross multiply
    77,840.10x = 116,760.23 × 21,680.32
  4. Step 4: Simplify right side
    77,840.10x = 2,531,399,149.67
  5. Step 5: Solve for x
    x = 2,531,399,149.67/77,840.10
  6. Step 6: Final answer
    x = 32,520.50

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.