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Finding the Fourth Proportional to 68,991.40, 103,280.82 and 42,253.19

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Solution

The fourth proportional to 68,991.40, 103,280.82 and 42,253.19 is: 63,253.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,991.40 : 103,280.82 = 42,253.19 : x
  2. Step 2: Convert to fraction form
    68,991.40/103,280.82 = 42,253.19/x
  3. Step 3: Cross multiply
    68,991.40x = 103,280.82 × 42,253.19
  4. Step 4: Simplify right side
    68,991.40x = 4,363,944,641.89
  5. Step 5: Solve for x
    x = 4,363,944,641.89/68,991.40
  6. Step 6: Final answer
    x = 63,253.46

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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.