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Finding the Fourth Proportional to 121,502.40, 167,424.48 and 89,620.80

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Solution

The fourth proportional to 121,502.40, 167,424.48 and 89,620.80 is: 123,493.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,502.40 : 167,424.48 = 89,620.80 : x
  2. Step 2: Convert to fraction form
    121,502.40/167,424.48 = 89,620.80/x
  3. Step 3: Cross multiply
    121,502.40x = 167,424.48 × 89,620.80
  4. Step 4: Simplify right side
    121,502.40x = 15,004,715,837.18
  5. Step 5: Solve for x
    x = 15,004,715,837.18/121,502.40
  6. Step 6: Final answer
    x = 123,493.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.