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Finding the Fourth Proportional to 113,502.70, 170,254.05 and 90,001.90

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Solution

The fourth proportional to 113,502.70, 170,254.05 and 90,001.90 is: 135,002.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,502.70 : 170,254.05 = 90,001.90 : x
  2. Step 2: Convert to fraction form
    113,502.70/170,254.05 = 90,001.90/x
  3. Step 3: Cross multiply
    113,502.70x = 170,254.05 × 90,001.90
  4. Step 4: Simplify right side
    113,502.70x = 15,323,187,982.70
  5. Step 5: Solve for x
    x = 15,323,187,982.70/113,502.70
  6. Step 6: Final answer
    x = 135,002.85

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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.