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Finding the Fourth Proportional to 86,153.99, 129,231.10 and 41,787.28

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Solution

The fourth proportional to 86,153.99, 129,231.10 and 41,787.28 is: 62,680.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,153.99 : 129,231.10 = 41,787.28 : x
  2. Step 2: Convert to fraction form
    86,153.99/129,231.10 = 41,787.28/x
  3. Step 3: Cross multiply
    86,153.99x = 129,231.10 × 41,787.28
  4. Step 4: Simplify right side
    86,153.99x = 5,400,216,160.41
  5. Step 5: Solve for x
    x = 5,400,216,160.41/86,153.99
  6. Step 6: Final answer
    x = 62,680.98

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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.