Home / 81,255,499.38-121,819,116.51-40,286,691.54

Finding the Fourth Proportional to 81,255,499.38, 121,819,116.51 and 40,286,691.54

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Solution

The fourth proportional to 81,255,499.38, 121,819,116.51 and 40,286,691.54 is: 60,398,240.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,255,499.38 : 121,819,116.51 = 40,286,691.54 : x
  2. Step 2: Convert to fraction form
    81,255,499.38/121,819,116.51 = 40,286,691.54/x
  3. Step 3: Cross multiply
    81,255,499.38x = 121,819,116.51 × 40,286,691.54
  4. Step 4: Simplify right side
    81,255,499.38x = 4,907,689,170,513,691
  5. Step 5: Solve for x
    x = 4,907,689,170,513,691/81,255,499.38
  6. Step 6: Final answer
    x = 60,398,240.22

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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.