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Finding the Fourth Proportional to 86,598.90, 129,898.35 and 76,922.10

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Solution

The fourth proportional to 86,598.90, 129,898.35 and 76,922.10 is: 115,383.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,598.90 : 129,898.35 = 76,922.10 : x
  2. Step 2: Convert to fraction form
    86,598.90/129,898.35 = 76,922.10/x
  3. Step 3: Cross multiply
    86,598.90x = 129,898.35 × 76,922.10
  4. Step 4: Simplify right side
    86,598.90x = 9,992,053,868.54
  5. Step 5: Solve for x
    x = 9,992,053,868.54/86,598.90
  6. Step 6: Final answer
    x = 115,383.15

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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.