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Finding the Fourth Proportional to 103,661.96, 155,304.30 and 72,005.14

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Solution

The fourth proportional to 103,661.96, 155,304.30 and 72,005.14 is: 107,876.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,661.96 : 155,304.30 = 72,005.14 : x
  2. Step 2: Convert to fraction form
    103,661.96/155,304.30 = 72,005.14/x
  3. Step 3: Cross multiply
    103,661.96x = 155,304.30 × 72,005.14
  4. Step 4: Simplify right side
    103,661.96x = 11,182,707,864.10
  5. Step 5: Solve for x
    x = 11,182,707,864.10/103,661.96
  6. Step 6: Final answer
    x = 107,876.68

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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.