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Finding the Fourth Proportional to 121,171.80, 181,744.76 and 42,287.52

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Solution

The fourth proportional to 121,171.80, 181,744.76 and 42,287.52 is: 63,426.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,171.80 : 181,744.76 = 42,287.52 : x
  2. Step 2: Convert to fraction form
    121,171.80/181,744.76 = 42,287.52/x
  3. Step 3: Cross multiply
    121,171.80x = 181,744.76 × 42,287.52
  4. Step 4: Simplify right side
    121,171.80x = 7,685,535,173.40
  5. Step 5: Solve for x
    x = 7,685,535,173.40/121,171.80
  6. Step 6: Final answer
    x = 63,426.76

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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.