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Finding the Fourth Proportional to 121,089.80, 181,635.73 and 42,203.90

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Solution

The fourth proportional to 121,089.80, 181,635.73 and 42,203.90 is: 63,306.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,089.80 : 181,635.73 = 42,203.90 : x
  2. Step 2: Convert to fraction form
    121,089.80/181,635.73 = 42,203.90/x
  3. Step 3: Cross multiply
    121,089.80x = 181,635.73 × 42,203.90
  4. Step 4: Simplify right side
    121,089.80x = 7,665,736,185.35
  5. Step 5: Solve for x
    x = 7,665,736,185.35/121,089.80
  6. Step 6: Final answer
    x = 63,306.21

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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.