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Finding the Fourth Proportional to 103,657.93, 155,793.62 and 86,003.11

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Solution

The fourth proportional to 103,657.93, 155,793.62 and 86,003.11 is: 129,259.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,657.93 : 155,793.62 = 86,003.11 : x
  2. Step 2: Convert to fraction form
    103,657.93/155,793.62 = 86,003.11/x
  3. Step 3: Cross multiply
    103,657.93x = 155,793.62 × 86,003.11
  4. Step 4: Simplify right side
    103,657.93x = 13,398,735,838.16
  5. Step 5: Solve for x
    x = 13,398,735,838.16/103,657.93
  6. Step 6: Final answer
    x = 129,259.15

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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.