Home / 102,121.71-140,919.66-56,799.78

Finding the Fourth Proportional to 102,121.71, 140,919.66 and 56,799.78

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Solution

The fourth proportional to 102,121.71, 140,919.66 and 56,799.78 is: 78,379.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,121.71 : 140,919.66 = 56,799.78 : x
  2. Step 2: Convert to fraction form
    102,121.71/140,919.66 = 56,799.78/x
  3. Step 3: Cross multiply
    102,121.71x = 140,919.66 × 56,799.78
  4. Step 4: Simplify right side
    102,121.71x = 8,004,205,685.67
  5. Step 5: Solve for x
    x = 8,004,205,685.67/102,121.71
  6. Step 6: Final answer
    x = 78,379.08

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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.