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Finding the Fourth Proportional to 202,387.40, 303,617.55 and 84,070.70

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Solution

The fourth proportional to 202,387.40, 303,617.55 and 84,070.70 is: 126,121.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,387.40 : 303,617.55 = 84,070.70 : x
  2. Step 2: Convert to fraction form
    202,387.40/303,617.55 = 84,070.70/x
  3. Step 3: Cross multiply
    202,387.40x = 303,617.55 × 84,070.70
  4. Step 4: Simplify right side
    202,387.40x = 25,525,339,960.79
  5. Step 5: Solve for x
    x = 25,525,339,960.79/202,387.40
  6. Step 6: Final answer
    x = 126,121.19

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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.