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Finding the Fourth Proportional to 94,751.80, 142,127.70 and 68,639.80

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Solution

The fourth proportional to 94,751.80, 142,127.70 and 68,639.80 is: 102,959.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,751.80 : 142,127.70 = 68,639.80 : x
  2. Step 2: Convert to fraction form
    94,751.80/142,127.70 = 68,639.80/x
  3. Step 3: Cross multiply
    94,751.80x = 142,127.70 × 68,639.80
  4. Step 4: Simplify right side
    94,751.80x = 9,755,616,902.46
  5. Step 5: Solve for x
    x = 9,755,616,902.46/94,751.80
  6. Step 6: Final answer
    x = 102,959.70

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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.