Home / 99,515.45-137,465.67-79,512.59

Finding the Fourth Proportional to 99,515.45, 137,465.67 and 79,512.59

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Solution

The fourth proportional to 99,515.45, 137,465.67 and 79,512.59 is: 109,834.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,515.45 : 137,465.67 = 79,512.59 : x
  2. Step 2: Convert to fraction form
    99,515.45/137,465.67 = 79,512.59/x
  3. Step 3: Cross multiply
    99,515.45x = 137,465.67 × 79,512.59
  4. Step 4: Simplify right side
    99,515.45x = 10,930,250,770.46
  5. Step 5: Solve for x
    x = 10,930,250,770.46/99,515.45
  6. Step 6: Final answer
    x = 109,834.72

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1.5x scale

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.