Home / 218,828.20-328,145.10-85,664.20

Finding the Fourth Proportional to 218,828.20, 328,145.10 and 85,664.20

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Solution

The fourth proportional to 218,828.20, 328,145.10 and 85,664.20 is: 128,458.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,828.20 : 328,145.10 = 85,664.20 : x
  2. Step 2: Convert to fraction form
    218,828.20/328,145.10 = 85,664.20/x
  3. Step 3: Cross multiply
    218,828.20x = 328,145.10 × 85,664.20
  4. Step 4: Simplify right side
    218,828.20x = 28,110,287,475.42
  5. Step 5: Solve for x
    x = 28,110,287,475.42/218,828.20
  6. Step 6: Final answer
    x = 128,458.25

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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.