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Finding the Fourth Proportional to 78,363.68, 117,388.64 and 44,990.08

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Solution

The fourth proportional to 78,363.68, 117,388.64 and 44,990.08 is: 67,395.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,363.68 : 117,388.64 = 44,990.08 : x
  2. Step 2: Convert to fraction form
    78,363.68/117,388.64 = 44,990.08/x
  3. Step 3: Cross multiply
    78,363.68x = 117,388.64 × 44,990.08
  4. Step 4: Simplify right side
    78,363.68x = 5,281,324,304.69
  5. Step 5: Solve for x
    x = 5,281,324,304.69/78,363.68
  6. Step 6: Final answer
    x = 67,395.05

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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.