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Finding the Fourth Proportional to 121,107.80, 181,677.90 and 42,246.20

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Solution

The fourth proportional to 121,107.80, 181,677.90 and 42,246.20 is: 63,374.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,107.80 : 181,677.90 = 42,246.20 : x
  2. Step 2: Convert to fraction form
    121,107.80/181,677.90 = 42,246.20/x
  3. Step 3: Cross multiply
    121,107.80x = 181,677.90 × 42,246.20
  4. Step 4: Simplify right side
    121,107.80x = 7,675,200,898.98
  5. Step 5: Solve for x
    x = 7,675,200,898.98/121,107.80
  6. Step 6: Final answer
    x = 63,374.95

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1.5x scale

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.