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Finding the Fourth Proportional to 218,770.20, 328,058.10 and 85,606.20

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Solution

The fourth proportional to 218,770.20, 328,058.10 and 85,606.20 is: 128,371.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,770.20 : 328,058.10 = 85,606.20 : x
  2. Step 2: Convert to fraction form
    218,770.20/328,058.10 = 85,606.20/x
  3. Step 3: Cross multiply
    218,770.20x = 328,058.10 × 85,606.20
  4. Step 4: Simplify right side
    218,770.20x = 28,083,807,320.22
  5. Step 5: Solve for x
    x = 28,083,807,320.22/218,770.20
  6. Step 6: Final answer
    x = 128,371.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.