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Finding the Fourth Proportional to 77,400.66, 116,101.11 and 21,241.53

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Solution

The fourth proportional to 77,400.66, 116,101.11 and 21,241.53 is: 31,862.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,400.66 : 116,101.11 = 21,241.53 : x
  2. Step 2: Convert to fraction form
    77,400.66/116,101.11 = 21,241.53/x
  3. Step 3: Cross multiply
    77,400.66x = 116,101.11 × 21,241.53
  4. Step 4: Simplify right side
    77,400.66x = 2,466,165,211.10
  5. Step 5: Solve for x
    x = 2,466,165,211.10/77,400.66
  6. Step 6: Final answer
    x = 31,862.33

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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.