Home / 318,120.40-477,155.76-140,633.20

Finding the Fourth Proportional to 318,120.40, 477,155.76 and 140,633.20

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Solution

The fourth proportional to 318,120.40, 477,155.76 and 140,633.20 is: 210,938.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,120.40 : 477,155.76 = 140,633.20 : x
  2. Step 2: Convert to fraction form
    318,120.40/477,155.76 = 140,633.20/x
  3. Step 3: Cross multiply
    318,120.40x = 477,155.76 × 140,633.20
  4. Step 4: Simplify right side
    318,120.40x = 67,103,941,427.23
  5. Step 5: Solve for x
    x = 67,103,941,427.23/318,120.40
  6. Step 6: Final answer
    x = 210,938.82

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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.