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Finding the Fourth Proportional to 121,244.70, 181,780.65 and 54,630.30

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Solution

The fourth proportional to 121,244.70, 181,780.65 and 54,630.30 is: 81,906.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,244.70 : 181,780.65 = 54,630.30 : x
  2. Step 2: Convert to fraction form
    121,244.70/181,780.65 = 54,630.30/x
  3. Step 3: Cross multiply
    121,244.70x = 181,780.65 × 54,630.30
  4. Step 4: Simplify right side
    121,244.70x = 9,930,731,443.70
  5. Step 5: Solve for x
    x = 9,930,731,443.70/121,244.70
  6. Step 6: Final answer
    x = 81,906.52

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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.