Home / 318,972.47-478,507.10-108,561.20

Finding the Fourth Proportional to 318,972.47, 478,507.10 and 108,561.20

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Solution

The fourth proportional to 318,972.47, 478,507.10 and 108,561.20 is: 162,858.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,972.47 : 478,507.10 = 108,561.20 : x
  2. Step 2: Convert to fraction form
    318,972.47/478,507.10 = 108,561.20/x
  3. Step 3: Cross multiply
    318,972.47x = 478,507.10 × 108,561.20
  4. Step 4: Simplify right side
    318,972.47x = 51,947,302,049.18
  5. Step 5: Solve for x
    x = 51,947,302,049.18/318,972.47
  6. Step 6: Final answer
    x = 162,858.26

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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.