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Finding the Fourth Proportional to 121,990.52, 182,940.26 and 42,005.90

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Solution

The fourth proportional to 121,990.52, 182,940.26 and 42,005.90 is: 62,993.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,990.52 : 182,940.26 = 42,005.90 : x
  2. Step 2: Convert to fraction form
    121,990.52/182,940.26 = 42,005.90/x
  3. Step 3: Cross multiply
    121,990.52x = 182,940.26 × 42,005.90
  4. Step 4: Simplify right side
    121,990.52x = 7,684,570,267.53
  5. Step 5: Solve for x
    x = 7,684,570,267.53/121,990.52
  6. Step 6: Final answer
    x = 62,993.18

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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.