Home / 42,481.20-63,721.80-38,690.40

Finding the Fourth Proportional to 42,481.20, 63,721.80 and 38,690.40

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Solution

The fourth proportional to 42,481.20, 63,721.80 and 38,690.40 is: 58,035.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,481.20 : 63,721.80 = 38,690.40 : x
  2. Step 2: Convert to fraction form
    42,481.20/63,721.80 = 38,690.40/x
  3. Step 3: Cross multiply
    42,481.20x = 63,721.80 × 38,690.40
  4. Step 4: Simplify right side
    42,481.20x = 2,465,421,930.72
  5. Step 5: Solve for x
    x = 2,465,421,930.72/42,481.20
  6. Step 6: Final answer
    x = 58,035.60

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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.