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Finding the Fourth Proportional to 218,101.70, 300,959.61 and 127,478.90

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Solution

The fourth proportional to 218,101.70, 300,959.61 and 127,478.90 is: 175,908.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,101.70 : 300,959.61 = 127,478.90 : x
  2. Step 2: Convert to fraction form
    218,101.70/300,959.61 = 127,478.90/x
  3. Step 3: Cross multiply
    218,101.70x = 300,959.61 × 127,478.90
  4. Step 4: Simplify right side
    218,101.70x = 38,366,000,027.23
  5. Step 5: Solve for x
    x = 38,366,000,027.23/218,101.70
  6. Step 6: Final answer
    x = 175,908.76

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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.