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Finding the Fourth Proportional to 66,442.81, 99,700.67 and 26,989.33

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Solution

The fourth proportional to 66,442.81, 99,700.67 and 26,989.33 is: 40,498.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,442.81 : 99,700.67 = 26,989.33 : x
  2. Step 2: Convert to fraction form
    66,442.81/99,700.67 = 26,989.33/x
  3. Step 3: Cross multiply
    66,442.81x = 99,700.67 × 26,989.33
  4. Step 4: Simplify right side
    66,442.81x = 2,690,854,148.90
  5. Step 5: Solve for x
    x = 2,690,854,148.90/66,442.81
  6. Step 6: Final answer
    x = 40,498.80

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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.