Home / 318,865.08-478,278.18-131,871.72

Finding the Fourth Proportional to 318,865.08, 478,278.18 and 131,871.72

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Solution

The fourth proportional to 318,865.08, 478,278.18 and 131,871.72 is: 197,799.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,865.08 : 478,278.18 = 131,871.72 : x
  2. Step 2: Convert to fraction form
    318,865.08/478,278.18 = 131,871.72/x
  3. Step 3: Cross multiply
    318,865.08x = 478,278.18 × 131,871.72
  4. Step 4: Simplify right side
    318,865.08x = 63,071,366,235.07
  5. Step 5: Solve for x
    x = 63,071,366,235.07/318,865.08
  6. Step 6: Final answer
    x = 197,799.54

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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.