Home / 216,139.50-324,218.52-66,385.76

Finding the Fourth Proportional to 216,139.50, 324,218.52 and 66,385.76

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Solution

The fourth proportional to 216,139.50, 324,218.52 and 66,385.76 is: 99,581.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,139.50 : 324,218.52 = 66,385.76 : x
  2. Step 2: Convert to fraction form
    216,139.50/324,218.52 = 66,385.76/x
  3. Step 3: Cross multiply
    216,139.50x = 324,218.52 × 66,385.76
  4. Step 4: Simplify right side
    216,139.50x = 21,523,491,235.18
  5. Step 5: Solve for x
    x = 21,523,491,235.18/216,139.50
  6. Step 6: Final answer
    x = 99,581.48

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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.