Home / 78,521.64-108,420.69-60,343.57

Finding the Fourth Proportional to 78,521.64, 108,420.69 and 60,343.57

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Solution

The fourth proportional to 78,521.64, 108,420.69 and 60,343.57 is: 83,320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,521.64 : 108,420.69 = 60,343.57 : x
  2. Step 2: Convert to fraction form
    78,521.64/108,420.69 = 60,343.57/x
  3. Step 3: Cross multiply
    78,521.64x = 108,420.69 × 60,343.57
  4. Step 4: Simplify right side
    78,521.64x = 6,542,491,496.46
  5. Step 5: Solve for x
    x = 6,542,491,496.46/78,521.64
  6. Step 6: Final answer
    x = 83,320.87

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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.