Home / 68,987.12-103,495.61-20,951.79

Finding the Fourth Proportional to 68,987.12, 103,495.61 and 20,951.79

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Solution

The fourth proportional to 68,987.12, 103,495.61 and 20,951.79 is: 31,432.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,987.12 : 103,495.61 = 20,951.79 : x
  2. Step 2: Convert to fraction form
    68,987.12/103,495.61 = 20,951.79/x
  3. Step 3: Cross multiply
    68,987.12x = 103,495.61 × 20,951.79
  4. Step 4: Simplify right side
    68,987.12x = 2,168,417,793.77
  5. Step 5: Solve for x
    x = 2,168,417,793.77/68,987.12
  6. Step 6: Final answer
    x = 31,432.21

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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.