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Finding the Fourth Proportional to 129,558, 178,834.79 and 75,860.28

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Solution

The fourth proportional to 129,558, 178,834.79 and 75,860.28 is: 104,713.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,558 : 178,834.79 = 75,860.28 : x
  2. Step 2: Convert to fraction form
    129,558/178,834.79 = 75,860.28/x
  3. Step 3: Cross multiply
    129,558x = 178,834.79 × 75,860.28
  4. Step 4: Simplify right side
    129,558x = 13,566,456,863.84
  5. Step 5: Solve for x
    x = 13,566,456,863.84/129,558
  6. Step 6: Final answer
    x = 104,713.39

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1.5x scale

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.