Home / 91,140.80-136,711.20-51,118.70

Finding the Fourth Proportional to 91,140.80, 136,711.20 and 51,118.70

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Solution

The fourth proportional to 91,140.80, 136,711.20 and 51,118.70 is: 76,678.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,140.80 : 136,711.20 = 51,118.70 : x
  2. Step 2: Convert to fraction form
    91,140.80/136,711.20 = 51,118.70/x
  3. Step 3: Cross multiply
    91,140.80x = 136,711.20 × 51,118.70
  4. Step 4: Simplify right side
    91,140.80x = 6,988,498,819.44
  5. Step 5: Solve for x
    x = 6,988,498,819.44/91,140.80
  6. Step 6: Final answer
    x = 76,678.05

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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.