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Finding the Fourth Proportional to 113,739.50, 156,960.52 and 63,438.50

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Solution

The fourth proportional to 113,739.50, 156,960.52 and 63,438.50 is: 87,545.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,739.50 : 156,960.52 = 63,438.50 : x
  2. Step 2: Convert to fraction form
    113,739.50/156,960.52 = 63,438.50/x
  3. Step 3: Cross multiply
    113,739.50x = 156,960.52 × 63,438.50
  4. Step 4: Simplify right side
    113,739.50x = 9,957,339,948.02
  5. Step 5: Solve for x
    x = 9,957,339,948.02/113,739.50
  6. Step 6: Final answer
    x = 87,545.14

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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.