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Finding the Fourth Proportional to 86,599.80, 129,872.70 and 34,025.40

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Solution

The fourth proportional to 86,599.80, 129,872.70 and 34,025.40 is: 51,027.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,599.80 : 129,872.70 = 34,025.40 : x
  2. Step 2: Convert to fraction form
    86,599.80/129,872.70 = 34,025.40/x
  3. Step 3: Cross multiply
    86,599.80x = 129,872.70 × 34,025.40
  4. Step 4: Simplify right side
    86,599.80x = 4,418,970,566.58
  5. Step 5: Solve for x
    x = 4,418,970,566.58/86,599.80
  6. Step 6: Final answer
    x = 51,027.49

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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.