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Finding the Fourth Proportional to 138,615.60, 208,020.60 and 88,816.80

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Solution

The fourth proportional to 138,615.60, 208,020.60 and 88,816.80 is: 133,287.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,615.60 : 208,020.60 = 88,816.80 : x
  2. Step 2: Convert to fraction form
    138,615.60/208,020.60 = 88,816.80/x
  3. Step 3: Cross multiply
    138,615.60x = 208,020.60 × 88,816.80
  4. Step 4: Simplify right side
    138,615.60x = 18,475,724,026.08
  5. Step 5: Solve for x
    x = 18,475,724,026.08/138,615.60
  6. Step 6: Final answer
    x = 133,287.48

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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.