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Finding the Fourth Proportional to 218,421.16, 327,514.29 and 128,494.96

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Solution

The fourth proportional to 218,421.16, 327,514.29 and 128,494.96 is: 192,673.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,421.16 : 327,514.29 = 128,494.96 : x
  2. Step 2: Convert to fraction form
    218,421.16/327,514.29 = 128,494.96/x
  3. Step 3: Cross multiply
    218,421.16x = 327,514.29 × 128,494.96
  4. Step 4: Simplify right side
    218,421.16x = 42,083,935,592.98
  5. Step 5: Solve for x
    x = 42,083,935,592.98/218,421.16
  6. Step 6: Final answer
    x = 192,673.35

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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.