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Finding the Fourth Proportional to 90,207.66, 124,343.16 and 71,057.09

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Solution

The fourth proportional to 90,207.66, 124,343.16 and 71,057.09 is: 97,945.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,207.66 : 124,343.16 = 71,057.09 : x
  2. Step 2: Convert to fraction form
    90,207.66/124,343.16 = 71,057.09/x
  3. Step 3: Cross multiply
    90,207.66x = 124,343.16 × 71,057.09
  4. Step 4: Simplify right side
    90,207.66x = 8,835,462,489.29
  5. Step 5: Solve for x
    x = 8,835,462,489.29/90,207.66
  6. Step 6: Final answer
    x = 97,945.81

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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.