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Finding the Fourth Proportional to 100,615.68, 138,855.60 and 58,188.96

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Solution

The fourth proportional to 100,615.68, 138,855.60 and 58,188.96 is: 80,304.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,615.68 : 138,855.60 = 58,188.96 : x
  2. Step 2: Convert to fraction form
    100,615.68/138,855.60 = 58,188.96/x
  3. Step 3: Cross multiply
    100,615.68x = 138,855.60 × 58,188.96
  4. Step 4: Simplify right side
    100,615.68x = 8,079,862,954.18
  5. Step 5: Solve for x
    x = 8,079,862,954.18/100,615.68
  6. Step 6: Final answer
    x = 80,304.21

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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.