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Finding the Fourth Proportional to 117,129.92, 175,352.16 and 72,622.40

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Solution

The fourth proportional to 117,129.92, 175,352.16 and 72,622.40 is: 108,721.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,129.92 : 175,352.16 = 72,622.40 : x
  2. Step 2: Convert to fraction form
    117,129.92/175,352.16 = 72,622.40/x
  3. Step 3: Cross multiply
    117,129.92x = 175,352.16 × 72,622.40
  4. Step 4: Simplify right side
    117,129.92x = 12,734,494,704.38
  5. Step 5: Solve for x
    x = 12,734,494,704.38/117,129.92
  6. Step 6: Final answer
    x = 108,721.11

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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.