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Finding the Fourth Proportional to 66,610.76, 99,913.83 and 16,691.28

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Solution

The fourth proportional to 66,610.76, 99,913.83 and 16,691.28 is: 25,036.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,610.76 : 99,913.83 = 16,691.28 : x
  2. Step 2: Convert to fraction form
    66,610.76/99,913.83 = 16,691.28/x
  3. Step 3: Cross multiply
    66,610.76x = 99,913.83 × 16,691.28
  4. Step 4: Simplify right side
    66,610.76x = 1,667,689,712.40
  5. Step 5: Solve for x
    x = 1,667,689,712.40/66,610.76
  6. Step 6: Final answer
    x = 25,036.34

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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.