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Finding the Fourth Proportional to 129,287.56, 193,620.30 and 73,715.08

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Solution

The fourth proportional to 129,287.56, 193,620.30 and 73,715.08 is: 110,395.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,287.56 : 193,620.30 = 73,715.08 : x
  2. Step 2: Convert to fraction form
    129,287.56/193,620.30 = 73,715.08/x
  3. Step 3: Cross multiply
    129,287.56x = 193,620.30 × 73,715.08
  4. Step 4: Simplify right side
    129,287.56x = 14,272,735,904.12
  5. Step 5: Solve for x
    x = 14,272,735,904.12/129,287.56
  6. Step 6: Final answer
    x = 110,395.28

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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.