Home / 72,785.11-100,442.01-40,519.30

Finding the Fourth Proportional to 72,785.11, 100,442.01 and 40,519.30

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Solution

The fourth proportional to 72,785.11, 100,442.01 and 40,519.30 is: 55,915.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,785.11 : 100,442.01 = 40,519.30 : x
  2. Step 2: Convert to fraction form
    72,785.11/100,442.01 = 40,519.30/x
  3. Step 3: Cross multiply
    72,785.11x = 100,442.01 × 40,519.30
  4. Step 4: Simplify right side
    72,785.11x = 4,069,839,935.79
  5. Step 5: Solve for x
    x = 4,069,839,935.79/72,785.11
  6. Step 6: Final answer
    x = 55,915.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.