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Finding the Fourth Proportional to 321,265.08, 481,920.16 and 129,139.56

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Solution

The fourth proportional to 321,265.08, 481,920.16 and 129,139.56 is: 193,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,265.08 : 481,920.16 = 129,139.56 : x
  2. Step 2: Convert to fraction form
    321,265.08/481,920.16 = 129,139.56/x
  3. Step 3: Cross multiply
    321,265.08x = 481,920.16 × 129,139.56
  4. Step 4: Simplify right side
    321,265.08x = 62,234,957,417.53
  5. Step 5: Solve for x
    x = 62,234,957,417.53/321,265.08
  6. Step 6: Final answer
    x = 193,718.40

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1.5x scale

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.