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Finding the Fourth Proportional to 69,209.40, 103,595.40 and 54,337.80

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Solution

The fourth proportional to 69,209.40, 103,595.40 and 54,337.80 is: 81,334.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,209.40 : 103,595.40 = 54,337.80 : x
  2. Step 2: Convert to fraction form
    69,209.40/103,595.40 = 54,337.80/x
  3. Step 3: Cross multiply
    69,209.40x = 103,595.40 × 54,337.80
  4. Step 4: Simplify right side
    69,209.40x = 5,629,146,126.12
  5. Step 5: Solve for x
    x = 5,629,146,126.12/69,209.40
  6. Step 6: Final answer
    x = 81,334.99

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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.