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Finding the Fourth Proportional to 85,086.30, 127,629.45 and 38,430.30

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Solution

The fourth proportional to 85,086.30, 127,629.45 and 38,430.30 is: 57,645.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,086.30 : 127,629.45 = 38,430.30 : x
  2. Step 2: Convert to fraction form
    85,086.30/127,629.45 = 38,430.30/x
  3. Step 3: Cross multiply
    85,086.30x = 127,629.45 × 38,430.30
  4. Step 4: Simplify right side
    85,086.30x = 4,904,838,052.34
  5. Step 5: Solve for x
    x = 4,904,838,052.34/85,086.30
  6. Step 6: Final answer
    x = 57,645.45

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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.