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Finding the Fourth Proportional to 123,079.92, 169,890.66 and 74,684.04

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Solution

The fourth proportional to 123,079.92, 169,890.66 and 74,684.04 is: 103,088.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,079.92 : 169,890.66 = 74,684.04 : x
  2. Step 2: Convert to fraction form
    123,079.92/169,890.66 = 74,684.04/x
  3. Step 3: Cross multiply
    123,079.92x = 169,890.66 × 74,684.04
  4. Step 4: Simplify right side
    123,079.92x = 12,688,120,847.07
  5. Step 5: Solve for x
    x = 12,688,120,847.07/123,079.92
  6. Step 6: Final answer
    x = 103,088.47

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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.