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Finding the Fourth Proportional to 83,756.70, 125,635.05 and 79,868.70

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Solution

The fourth proportional to 83,756.70, 125,635.05 and 79,868.70 is: 119,803.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,756.70 : 125,635.05 = 79,868.70 : x
  2. Step 2: Convert to fraction form
    83,756.70/125,635.05 = 79,868.70/x
  3. Step 3: Cross multiply
    83,756.70x = 125,635.05 × 79,868.70
  4. Step 4: Simplify right side
    83,756.70x = 10,034,308,117.94
  5. Step 5: Solve for x
    x = 10,034,308,117.94/83,756.70
  6. Step 6: Final answer
    x = 119,803.05

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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.