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Finding the Fourth Proportional to 136,140.80, 204,259.80 and 57,279.20

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Solution

The fourth proportional to 136,140.80, 204,259.80 and 57,279.20 is: 85,939.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,140.80 : 204,259.80 = 57,279.20 : x
  2. Step 2: Convert to fraction form
    136,140.80/204,259.80 = 57,279.20/x
  3. Step 3: Cross multiply
    136,140.80x = 204,259.80 × 57,279.20
  4. Step 4: Simplify right side
    136,140.80x = 11,699,837,936.16
  5. Step 5: Solve for x
    x = 11,699,837,936.16/136,140.80
  6. Step 6: Final answer
    x = 85,939.25

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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.