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Finding the Fourth Proportional to 66,920.17, 100,505.06 and 58,917.78

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Solution

The fourth proportional to 66,920.17, 100,505.06 and 58,917.78 is: 88,486.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,920.17 : 100,505.06 = 58,917.78 : x
  2. Step 2: Convert to fraction form
    66,920.17/100,505.06 = 58,917.78/x
  3. Step 3: Cross multiply
    66,920.17x = 100,505.06 × 58,917.78
  4. Step 4: Simplify right side
    66,920.17x = 5,921,535,013.97
  5. Step 5: Solve for x
    x = 5,921,535,013.97/66,920.17
  6. Step 6: Final answer
    x = 88,486.55

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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.