Home / 85,445.50-128,170.26-29,285.16

Finding the Fourth Proportional to 85,445.50, 128,170.26 and 29,285.16

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Solution

The fourth proportional to 85,445.50, 128,170.26 and 29,285.16 is: 43,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,445.50 : 128,170.26 = 29,285.16 : x
  2. Step 2: Convert to fraction form
    85,445.50/128,170.26 = 29,285.16/x
  3. Step 3: Cross multiply
    85,445.50x = 128,170.26 × 29,285.16
  4. Step 4: Simplify right side
    85,445.50x = 3,753,486,571.34
  5. Step 5: Solve for x
    x = 3,753,486,571.34/85,445.50
  6. Step 6: Final answer
    x = 43,928.43

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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.