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Finding the Fourth Proportional to 64,680, 89,263.53 and 36,387.78

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Solution

The fourth proportional to 64,680, 89,263.53 and 36,387.78 is: 50,218.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,680 : 89,263.53 = 36,387.78 : x
  2. Step 2: Convert to fraction form
    64,680/89,263.53 = 36,387.78/x
  3. Step 3: Cross multiply
    64,680x = 89,263.53 × 36,387.78
  4. Step 4: Simplify right side
    64,680x = 3,248,101,691.66
  5. Step 5: Solve for x
    x = 3,248,101,691.66/64,680
  6. Step 6: Final answer
    x = 50,218.02

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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.