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Finding the Fourth Proportional to 218,081.12, 300,899.40 and 127,385.60

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Solution

The fourth proportional to 218,081.12, 300,899.40 and 127,385.60 is: 175,761.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,081.12 : 300,899.40 = 127,385.60 : x
  2. Step 2: Convert to fraction form
    218,081.12/300,899.40 = 127,385.60/x
  3. Step 3: Cross multiply
    218,081.12x = 300,899.40 × 127,385.60
  4. Step 4: Simplify right side
    218,081.12x = 38,330,250,608.64
  5. Step 5: Solve for x
    x = 38,330,250,608.64/218,081.12
  6. Step 6: Final answer
    x = 175,761.44

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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.