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Finding the Fourth Proportional to 79,888.48, 119,834.54 and 20,726.48

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Solution

The fourth proportional to 79,888.48, 119,834.54 and 20,726.48 is: 31,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,888.48 : 119,834.54 = 20,726.48 : x
  2. Step 2: Convert to fraction form
    79,888.48/119,834.54 = 20,726.48/x
  3. Step 3: Cross multiply
    79,888.48x = 119,834.54 × 20,726.48
  4. Step 4: Simplify right side
    79,888.48x = 2,483,748,470.30
  5. Step 5: Solve for x
    x = 2,483,748,470.30/79,888.48
  6. Step 6: Final answer
    x = 31,090.20

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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.