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Finding the Fourth Proportional to 86,390.96, 129,599.52 and 44,295.20

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Solution

The fourth proportional to 86,390.96, 129,599.52 and 44,295.20 is: 66,449.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,390.96 : 129,599.52 = 44,295.20 : x
  2. Step 2: Convert to fraction form
    86,390.96/129,599.52 = 44,295.20/x
  3. Step 3: Cross multiply
    86,390.96x = 129,599.52 × 44,295.20
  4. Step 4: Simplify right side
    86,390.96x = 5,740,636,658.30
  5. Step 5: Solve for x
    x = 5,740,636,658.30/86,390.96
  6. Step 6: Final answer
    x = 66,449.51

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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.