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Finding the Fourth Proportional to 217,781.90, 300,486.44 and 127,086.10

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Solution

The fourth proportional to 217,781.90, 300,486.44 and 127,086.10 is: 175,348.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,781.90 : 300,486.44 = 127,086.10 : x
  2. Step 2: Convert to fraction form
    217,781.90/300,486.44 = 127,086.10/x
  3. Step 3: Cross multiply
    217,781.90x = 300,486.44 × 127,086.10
  4. Step 4: Simplify right side
    217,781.90x = 38,187,649,762.48
  5. Step 5: Solve for x
    x = 38,187,649,762.48/217,781.90
  6. Step 6: Final answer
    x = 175,348.13

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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.