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Finding the Fourth Proportional to 156,640.60, 234,960.90 and 112,681.90

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Solution

The fourth proportional to 156,640.60, 234,960.90 and 112,681.90 is: 169,022.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,640.60 : 234,960.90 = 112,681.90 : x
  2. Step 2: Convert to fraction form
    156,640.60/234,960.90 = 112,681.90/x
  3. Step 3: Cross multiply
    156,640.60x = 234,960.90 × 112,681.90
  4. Step 4: Simplify right side
    156,640.60x = 26,475,840,637.71
  5. Step 5: Solve for x
    x = 26,475,840,637.71/156,640.60
  6. Step 6: Final answer
    x = 169,022.85

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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.