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Finding the Fourth Proportional to 356,747.76, 535,120.56 and 90,507.78

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Solution

The fourth proportional to 356,747.76, 535,120.56 and 90,507.78 is: 135,761.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,747.76 : 535,120.56 = 90,507.78 : x
  2. Step 2: Convert to fraction form
    356,747.76/535,120.56 = 90,507.78/x
  3. Step 3: Cross multiply
    356,747.76x = 535,120.56 × 90,507.78
  4. Step 4: Simplify right side
    356,747.76x = 48,432,573,917.96
  5. Step 5: Solve for x
    x = 48,432,573,917.96/356,747.76
  6. Step 6: Final answer
    x = 135,761.40

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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.