Home / 68,778.20-103,070.10-42,404.60

Finding the Fourth Proportional to 68,778.20, 103,070.10 and 42,404.60

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Solution

The fourth proportional to 68,778.20, 103,070.10 and 42,404.60 is: 63,546.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,778.20 : 103,070.10 = 42,404.60 : x
  2. Step 2: Convert to fraction form
    68,778.20/103,070.10 = 42,404.60/x
  3. Step 3: Cross multiply
    68,778.20x = 103,070.10 × 42,404.60
  4. Step 4: Simplify right side
    68,778.20x = 4,370,646,362.46
  5. Step 5: Solve for x
    x = 4,370,646,362.46/68,778.20
  6. Step 6: Final answer
    x = 63,546.97

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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.