Home / 121,410.20-182,115.30-77,123.45

Finding the Fourth Proportional to 121,410.20, 182,115.30 and 77,123.45

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Solution

The fourth proportional to 121,410.20, 182,115.30 and 77,123.45 is: 115,685.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,410.20 : 182,115.30 = 77,123.45 : x
  2. Step 2: Convert to fraction form
    121,410.20/182,115.30 = 77,123.45/x
  3. Step 3: Cross multiply
    121,410.20x = 182,115.30 × 77,123.45
  4. Step 4: Simplify right side
    121,410.20x = 14,045,360,233.79
  5. Step 5: Solve for x
    x = 14,045,360,233.79/121,410.20
  6. Step 6: Final answer
    x = 115,685.18

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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.