Home / 66,139.50-99,223.62-21,770.76

Finding the Fourth Proportional to 66,139.50, 99,223.62 and 21,770.76

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Solution

The fourth proportional to 66,139.50, 99,223.62 and 21,770.76 is: 32,660.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,139.50 : 99,223.62 = 21,770.76 : x
  2. Step 2: Convert to fraction form
    66,139.50/99,223.62 = 21,770.76/x
  3. Step 3: Cross multiply
    66,139.50x = 99,223.62 × 21,770.76
  4. Step 4: Simplify right side
    66,139.50x = 2,160,173,617.35
  5. Step 5: Solve for x
    x = 2,160,173,617.35/66,139.50
  6. Step 6: Final answer
    x = 32,660.87

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1.5x scale

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.