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Finding the Fourth Proportional to 90,443.93, 124,787.18 and 71,264.26

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Solution

The fourth proportional to 90,443.93, 124,787.18 and 71,264.26 is: 98,324.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,443.93 : 124,787.18 = 71,264.26 : x
  2. Step 2: Convert to fraction form
    90,443.93/124,787.18 = 71,264.26/x
  3. Step 3: Cross multiply
    90,443.93x = 124,787.18 × 71,264.26
  4. Step 4: Simplify right side
    90,443.93x = 8,892,865,059.93
  5. Step 5: Solve for x
    x = 8,892,865,059.93/90,443.93
  6. Step 6: Final answer
    x = 98,324.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.