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Finding the Fourth Proportional to 107,708.43, 148,615.92 and 65,242.29

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Solution

The fourth proportional to 107,708.43, 148,615.92 and 65,242.29 is: 90,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,708.43 : 148,615.92 = 65,242.29 : x
  2. Step 2: Convert to fraction form
    107,708.43/148,615.92 = 65,242.29/x
  3. Step 3: Cross multiply
    107,708.43x = 148,615.92 × 65,242.29
  4. Step 4: Simplify right side
    107,708.43x = 9,696,042,951.26
  5. Step 5: Solve for x
    x = 9,696,042,951.26/107,708.43
  6. Step 6: Final answer
    x = 90,021.21

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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.