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Finding the Fourth Proportional to 343,441.62, 515,104.11 and 90,724.86

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Solution

The fourth proportional to 343,441.62, 515,104.11 and 90,724.86 is: 136,071.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,441.62 : 515,104.11 = 90,724.86 : x
  2. Step 2: Convert to fraction form
    343,441.62/515,104.11 = 90,724.86/x
  3. Step 3: Cross multiply
    343,441.62x = 515,104.11 × 90,724.86
  4. Step 4: Simplify right side
    343,441.62x = 46,732,748,265.17
  5. Step 5: Solve for x
    x = 46,732,748,265.17/343,441.62
  6. Step 6: Final answer
    x = 136,071.88

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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.