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Finding the Fourth Proportional to 139,661.79, 209,493.14 and 38,461.23

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Solution

The fourth proportional to 139,661.79, 209,493.14 and 38,461.23 is: 57,691.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,661.79 : 209,493.14 = 38,461.23 : x
  2. Step 2: Convert to fraction form
    139,661.79/209,493.14 = 38,461.23/x
  3. Step 3: Cross multiply
    139,661.79x = 209,493.14 × 38,461.23
  4. Step 4: Simplify right side
    139,661.79x = 8,057,363,648.66
  5. Step 5: Solve for x
    x = 8,057,363,648.66/139,661.79
  6. Step 6: Final answer
    x = 57,691.97

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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.