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Finding the Fourth Proportional to 121,498.80, 182,114.55 and 42,572.40

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Solution

The fourth proportional to 121,498.80, 182,114.55 and 42,572.40 is: 63,811.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,498.80 : 182,114.55 = 42,572.40 : x
  2. Step 2: Convert to fraction form
    121,498.80/182,114.55 = 42,572.40/x
  3. Step 3: Cross multiply
    121,498.80x = 182,114.55 × 42,572.40
  4. Step 4: Simplify right side
    121,498.80x = 7,753,053,468.42
  5. Step 5: Solve for x
    x = 7,753,053,468.42/121,498.80
  6. Step 6: Final answer
    x = 63,811.77

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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.