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Finding the Fourth Proportional to 456,730.80, 685,139.40 and 124,306.80

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Solution

The fourth proportional to 456,730.80, 685,139.40 and 124,306.80 is: 186,471.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,730.80 : 685,139.40 = 124,306.80 : x
  2. Step 2: Convert to fraction form
    456,730.80/685,139.40 = 124,306.80/x
  3. Step 3: Cross multiply
    456,730.80x = 685,139.40 × 124,306.80
  4. Step 4: Simplify right side
    456,730.80x = 85,167,486,367.92
  5. Step 5: Solve for x
    x = 85,167,486,367.92/456,730.80
  6. Step 6: Final answer
    x = 186,471.96

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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.