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Finding the Fourth Proportional to 66,460.91, 99,691.36 and 19,713.38

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Solution

The fourth proportional to 66,460.91, 99,691.36 and 19,713.38 is: 29,570.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,460.91 : 99,691.36 = 19,713.38 : x
  2. Step 2: Convert to fraction form
    66,460.91/99,691.36 = 19,713.38/x
  3. Step 3: Cross multiply
    66,460.91x = 99,691.36 × 19,713.38
  4. Step 4: Simplify right side
    66,460.91x = 1,965,253,114.66
  5. Step 5: Solve for x
    x = 1,965,253,114.66/66,460.91
  6. Step 6: Final answer
    x = 29,570.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.