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Finding the Fourth Proportional to 93,578.09, 129,160.76 and 78,446.78

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Solution

The fourth proportional to 93,578.09, 129,160.76 and 78,446.78 is: 108,275.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,578.09 : 129,160.76 = 78,446.78 : x
  2. Step 2: Convert to fraction form
    93,578.09/129,160.76 = 78,446.78/x
  3. Step 3: Cross multiply
    93,578.09x = 129,160.76 × 78,446.78
  4. Step 4: Simplify right side
    93,578.09x = 10,132,245,724.35
  5. Step 5: Solve for x
    x = 10,132,245,724.35/93,578.09
  6. Step 6: Final answer
    x = 108,275.83

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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.