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Finding the Fourth Proportional to 86,314.59, 129,488.22 and 33,720.75

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Solution

The fourth proportional to 86,314.59, 129,488.22 and 33,720.75 is: 50,587.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,314.59 : 129,488.22 = 33,720.75 : x
  2. Step 2: Convert to fraction form
    86,314.59/129,488.22 = 33,720.75/x
  3. Step 3: Cross multiply
    86,314.59x = 129,488.22 × 33,720.75
  4. Step 4: Simplify right side
    86,314.59x = 4,366,439,894.57
  5. Step 5: Solve for x
    x = 4,366,439,894.57/86,314.59
  6. Step 6: Final answer
    x = 50,587.51

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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.