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Finding the Fourth Proportional to 93,691.86, 129,279.66 and 53,405.70

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Solution

The fourth proportional to 93,691.86, 129,279.66 and 53,405.70 is: 73,691.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,691.86 : 129,279.66 = 53,405.70 : x
  2. Step 2: Convert to fraction form
    93,691.86/129,279.66 = 53,405.70/x
  3. Step 3: Cross multiply
    93,691.86x = 129,279.66 × 53,405.70
  4. Step 4: Simplify right side
    93,691.86x = 6,904,270,738.06
  5. Step 5: Solve for x
    x = 6,904,270,738.06/93,691.86
  6. Step 6: Final answer
    x = 73,691.25

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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.