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Finding the Fourth Proportional to 66,913.08, 100,211.31 and 58,100.10

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Solution

The fourth proportional to 66,913.08, 100,211.31 and 58,100.10 is: 87,012.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,913.08 : 100,211.31 = 58,100.10 : x
  2. Step 2: Convert to fraction form
    66,913.08/100,211.31 = 58,100.10/x
  3. Step 3: Cross multiply
    66,913.08x = 100,211.31 × 58,100.10
  4. Step 4: Simplify right side
    66,913.08x = 5,822,287,132.13
  5. Step 5: Solve for x
    x = 5,822,287,132.13/66,913.08
  6. Step 6: Final answer
    x = 87,012.69

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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.