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Finding the Fourth Proportional to 220,911.68, 304,677.92 and 135,876.16

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Solution

The fourth proportional to 220,911.68, 304,677.92 and 135,876.16 is: 187,398.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,911.68 : 304,677.92 = 135,876.16 : x
  2. Step 2: Convert to fraction form
    220,911.68/304,677.92 = 135,876.16/x
  3. Step 3: Cross multiply
    220,911.68x = 304,677.92 × 135,876.16
  4. Step 4: Simplify right side
    220,911.68x = 41,398,465,806.39
  5. Step 5: Solve for x
    x = 41,398,465,806.39/220,911.68
  6. Step 6: Final answer
    x = 187,398.27

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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.