Home / 218,744.32-328,143.84-85,607.38

Finding the Fourth Proportional to 218,744.32, 328,143.84 and 85,607.38

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Solution

The fourth proportional to 218,744.32, 328,143.84 and 85,607.38 is: 128,421.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,744.32 : 328,143.84 = 85,607.38 : x
  2. Step 2: Convert to fraction form
    218,744.32/328,143.84 = 85,607.38/x
  3. Step 3: Cross multiply
    218,744.32x = 328,143.84 × 85,607.38
  4. Step 4: Simplify right side
    218,744.32x = 28,091,534,405.54
  5. Step 5: Solve for x
    x = 28,091,534,405.54/218,744.32
  6. Step 6: Final answer
    x = 128,421.78

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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.