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Finding the Fourth Proportional to 86,598.60, 129,899.87 and 68,841.53

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Solution

The fourth proportional to 86,598.60, 129,899.87 and 68,841.53 is: 103,263.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,598.60 : 129,899.87 = 68,841.53 : x
  2. Step 2: Convert to fraction form
    86,598.60/129,899.87 = 68,841.53/x
  3. Step 3: Cross multiply
    86,598.60x = 129,899.87 × 68,841.53
  4. Step 4: Simplify right side
    86,598.60x = 8,942,506,294.45
  5. Step 5: Solve for x
    x = 8,942,506,294.45/86,598.60
  6. Step 6: Final answer
    x = 103,263.87

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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.