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Finding the Fourth Proportional to 202,419.20, 303,142.80 and 108,718.40

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Solution

The fourth proportional to 202,419.20, 303,142.80 and 108,718.40 is: 162,816.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,419.20 : 303,142.80 = 108,718.40 : x
  2. Step 2: Convert to fraction form
    202,419.20/303,142.80 = 108,718.40/x
  3. Step 3: Cross multiply
    202,419.20x = 303,142.80 × 108,718.40
  4. Step 4: Simplify right side
    202,419.20x = 32,957,200,187.52
  5. Step 5: Solve for x
    x = 32,957,200,187.52/202,419.20
  6. Step 6: Final answer
    x = 162,816.57

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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.