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Finding the Fourth Proportional to 218,279.55, 301,243.28 and 122,780.55

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Solution

The fourth proportional to 218,279.55, 301,243.28 and 122,780.55 is: 169,447.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,279.55 : 301,243.28 = 122,780.55 : x
  2. Step 2: Convert to fraction form
    218,279.55/301,243.28 = 122,780.55/x
  3. Step 3: Cross multiply
    218,279.55x = 301,243.28 × 122,780.55
  4. Step 4: Simplify right side
    218,279.55x = 36,986,814,988.30
  5. Step 5: Solve for x
    x = 36,986,814,988.30/218,279.55
  6. Step 6: Final answer
    x = 169,447.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.