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Finding the Fourth Proportional to 143,871.76, 198,668.39 and 90,248.95

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Solution

The fourth proportional to 143,871.76, 198,668.39 and 90,248.95 is: 124,622.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,871.76 : 198,668.39 = 90,248.95 : x
  2. Step 2: Convert to fraction form
    143,871.76/198,668.39 = 90,248.95/x
  3. Step 3: Cross multiply
    143,871.76x = 198,668.39 × 90,248.95
  4. Step 4: Simplify right side
    143,871.76x = 17,929,613,595.69
  5. Step 5: Solve for x
    x = 17,929,613,595.69/143,871.76
  6. Step 6: Final answer
    x = 124,622.19

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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.