Home / 218,836.18-328,122.90-85,557.67

Finding the Fourth Proportional to 218,836.18, 328,122.90 and 85,557.67

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Solution

The fourth proportional to 218,836.18, 328,122.90 and 85,557.67 is: 128,285.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,836.18 : 328,122.90 = 85,557.67 : x
  2. Step 2: Convert to fraction form
    218,836.18/328,122.90 = 85,557.67/x
  3. Step 3: Cross multiply
    218,836.18x = 328,122.90 × 85,557.67
  4. Step 4: Simplify right side
    218,836.18x = 28,073,429,977.34
  5. Step 5: Solve for x
    x = 28,073,429,977.34/218,836.18
  6. Step 6: Final answer
    x = 128,285.14

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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.