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Finding the Fourth Proportional to 202,139.80, 303,209.70 and 69,000.10

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Solution

The fourth proportional to 202,139.80, 303,209.70 and 69,000.10 is: 103,500.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,139.80 : 303,209.70 = 69,000.10 : x
  2. Step 2: Convert to fraction form
    202,139.80/303,209.70 = 69,000.10/x
  3. Step 3: Cross multiply
    202,139.80x = 303,209.70 × 69,000.10
  4. Step 4: Simplify right side
    202,139.80x = 20,921,499,620.97
  5. Step 5: Solve for x
    x = 20,921,499,620.97/202,139.80
  6. Step 6: Final answer
    x = 103,500.15

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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.