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Finding the Fourth Proportional to 129,006.86, 178,033.88 and 71,647.08

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Solution

The fourth proportional to 129,006.86, 178,033.88 and 71,647.08 is: 98,875.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,006.86 : 178,033.88 = 71,647.08 : x
  2. Step 2: Convert to fraction form
    129,006.86/178,033.88 = 71,647.08/x
  3. Step 3: Cross multiply
    129,006.86x = 178,033.88 × 71,647.08
  4. Step 4: Simplify right side
    129,006.86x = 12,755,607,643.07
  5. Step 5: Solve for x
    x = 12,755,607,643.07/129,006.86
  6. Step 6: Final answer
    x = 98,875.42

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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.