Home / 218,958.05-328,621.61-85,931.73

Finding the Fourth Proportional to 218,958.05, 328,621.61 and 85,931.73

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Solution

The fourth proportional to 218,958.05, 328,621.61 and 85,931.73 is: 128,970.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,958.05 : 328,621.61 = 85,931.73 : x
  2. Step 2: Convert to fraction form
    218,958.05/328,621.61 = 85,931.73/x
  3. Step 3: Cross multiply
    218,958.05x = 328,621.61 × 85,931.73
  4. Step 4: Simplify right side
    218,958.05x = 28,239,023,677.51
  5. Step 5: Solve for x
    x = 28,239,023,677.51/218,958.05
  6. Step 6: Final answer
    x = 128,970.02

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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.