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Finding the Fourth Proportional to 137,209.10, 205,412.70 and 97,843.10

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Solution

The fourth proportional to 137,209.10, 205,412.70 and 97,843.10 is: 146,478.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,209.10 : 205,412.70 = 97,843.10 : x
  2. Step 2: Convert to fraction form
    137,209.10/205,412.70 = 97,843.10/x
  3. Step 3: Cross multiply
    137,209.10x = 205,412.70 × 97,843.10
  4. Step 4: Simplify right side
    137,209.10x = 20,098,215,347.37
  5. Step 5: Solve for x
    x = 20,098,215,347.37/137,209.10
  6. Step 6: Final answer
    x = 146,478.73

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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.