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Finding the Fourth Proportional to 63,177.81, 87,172.16 and 36,978.90

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Solution

The fourth proportional to 63,177.81, 87,172.16 and 36,978.90 is: 51,023.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,177.81 : 87,172.16 = 36,978.90 : x
  2. Step 2: Convert to fraction form
    63,177.81/87,172.16 = 36,978.90/x
  3. Step 3: Cross multiply
    63,177.81x = 87,172.16 × 36,978.90
  4. Step 4: Simplify right side
    63,177.81x = 3,223,530,402.53
  5. Step 5: Solve for x
    x = 3,223,530,402.53/63,177.81
  6. Step 6: Final answer
    x = 51,023.14

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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.