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Finding the Fourth Proportional to 63,142.56, 87,146.64 and 38,957.64

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Solution

The fourth proportional to 63,142.56, 87,146.64 and 38,957.64 is: 53,767.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,142.56 : 87,146.64 = 38,957.64 : x
  2. Step 2: Convert to fraction form
    63,142.56/87,146.64 = 38,957.64/x
  3. Step 3: Cross multiply
    63,142.56x = 87,146.64 × 38,957.64
  4. Step 4: Simplify right side
    63,142.56x = 3,395,027,428.33
  5. Step 5: Solve for x
    x = 3,395,027,428.33/63,142.56
  6. Step 6: Final answer
    x = 53,767.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.