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Finding the Fourth Proportional to 86,577.60, 129,866.40 and 68,862.90

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Solution

The fourth proportional to 86,577.60, 129,866.40 and 68,862.90 is: 103,294.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,577.60 : 129,866.40 = 68,862.90 : x
  2. Step 2: Convert to fraction form
    86,577.60/129,866.40 = 68,862.90/x
  3. Step 3: Cross multiply
    86,577.60x = 129,866.40 × 68,862.90
  4. Step 4: Simplify right side
    86,577.60x = 8,942,976,916.56
  5. Step 5: Solve for x
    x = 8,942,976,916.56/86,577.60
  6. Step 6: Final answer
    x = 103,294.35

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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.