Home / 85,490.24-128,235.34-23,160.74

Finding the Fourth Proportional to 85,490.24, 128,235.34 and 23,160.74

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Solution

The fourth proportional to 85,490.24, 128,235.34 and 23,160.74 is: 34,741.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,490.24 : 128,235.34 = 23,160.74 : x
  2. Step 2: Convert to fraction form
    85,490.24/128,235.34 = 23,160.74/x
  3. Step 3: Cross multiply
    85,490.24x = 128,235.34 × 23,160.74
  4. Step 4: Simplify right side
    85,490.24x = 2,970,024,626.05
  5. Step 5: Solve for x
    x = 2,970,024,626.05/85,490.24
  6. Step 6: Final answer
    x = 34,741.10

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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.