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Finding the Fourth Proportional to 78,378.64, 108,169.20 and 44,393.08

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Solution

The fourth proportional to 78,378.64, 108,169.20 and 44,393.08 is: 61,266.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,378.64 : 108,169.20 = 44,393.08 : x
  2. Step 2: Convert to fraction form
    78,378.64/108,169.20 = 44,393.08/x
  3. Step 3: Cross multiply
    78,378.64x = 108,169.20 × 44,393.08
  4. Step 4: Simplify right side
    78,378.64x = 4,801,963,949.14
  5. Step 5: Solve for x
    x = 4,801,963,949.14/78,378.64
  6. Step 6: Final answer
    x = 61,266.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.