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Finding the Fourth Proportional to 138,768.80, 208,003.92 and 59,920.16

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Solution

The fourth proportional to 138,768.80, 208,003.92 and 59,920.16 is: 89,815.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,768.80 : 208,003.92 = 59,920.16 : x
  2. Step 2: Convert to fraction form
    138,768.80/208,003.92 = 59,920.16/x
  3. Step 3: Cross multiply
    138,768.80x = 208,003.92 × 59,920.16
  4. Step 4: Simplify right side
    138,768.80x = 12,463,628,167.03
  5. Step 5: Solve for x
    x = 12,463,628,167.03/138,768.80
  6. Step 6: Final answer
    x = 89,815.78

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1.5x scale

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.