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Finding the Fourth Proportional to 138,334.80, 207,502.20 and 120,838.80

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Solution

The fourth proportional to 138,334.80, 207,502.20 and 120,838.80 is: 181,258.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,334.80 : 207,502.20 = 120,838.80 : x
  2. Step 2: Convert to fraction form
    138,334.80/207,502.20 = 120,838.80/x
  3. Step 3: Cross multiply
    138,334.80x = 207,502.20 × 120,838.80
  4. Step 4: Simplify right side
    138,334.80x = 25,074,316,845.36
  5. Step 5: Solve for x
    x = 25,074,316,845.36/138,334.80
  6. Step 6: Final answer
    x = 181,258.20

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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.