Home / 218,741.06-328,138.95-85,604.12

Finding the Fourth Proportional to 218,741.06, 328,138.95 and 85,604.12

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Solution

The fourth proportional to 218,741.06, 328,138.95 and 85,604.12 is: 128,416.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,741.06 : 328,138.95 = 85,604.12 : x
  2. Step 2: Convert to fraction form
    218,741.06/328,138.95 = 85,604.12/x
  3. Step 3: Cross multiply
    218,741.06x = 328,138.95 × 85,604.12
  4. Step 4: Simplify right side
    218,741.06x = 28,090,046,052.47
  5. Step 5: Solve for x
    x = 28,090,046,052.47/218,741.06
  6. Step 6: Final answer
    x = 128,416.89

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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.