Home / 121,815.20-182,722.80-92,290.70

Finding the Fourth Proportional to 121,815.20, 182,722.80 and 92,290.70

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Solution

The fourth proportional to 121,815.20, 182,722.80 and 92,290.70 is: 138,436.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,815.20 : 182,722.80 = 92,290.70 : x
  2. Step 2: Convert to fraction form
    121,815.20/182,722.80 = 92,290.70/x
  3. Step 3: Cross multiply
    121,815.20x = 182,722.80 × 92,290.70
  4. Step 4: Simplify right side
    121,815.20x = 16,863,615,117.96
  5. Step 5: Solve for x
    x = 16,863,615,117.96/121,815.20
  6. Step 6: Final answer
    x = 138,436.05

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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.