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Finding the Fourth Proportional to 86,587.40, 129,766.28 and 44,465.78

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Solution

The fourth proportional to 86,587.40, 129,766.28 and 44,465.78 is: 66,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,587.40 : 129,766.28 = 44,465.78 : x
  2. Step 2: Convert to fraction form
    86,587.40/129,766.28 = 44,465.78/x
  3. Step 3: Cross multiply
    86,587.40x = 129,766.28 × 44,465.78
  4. Step 4: Simplify right side
    86,587.40x = 5,770,157,986.74
  5. Step 5: Solve for x
    x = 5,770,157,986.74/86,587.40
  6. Step 6: Final answer
    x = 66,639.70

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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.