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Finding the Fourth Proportional to 78,392.79, 108,115.02 and 52,894.80

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Solution

The fourth proportional to 78,392.79, 108,115.02 and 52,894.80 is: 72,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,392.79 : 108,115.02 = 52,894.80 : x
  2. Step 2: Convert to fraction form
    78,392.79/108,115.02 = 52,894.80/x
  3. Step 3: Cross multiply
    78,392.79x = 108,115.02 × 52,894.80
  4. Step 4: Simplify right side
    78,392.79x = 5,718,722,359.90
  5. Step 5: Solve for x
    x = 5,718,722,359.90/78,392.79
  6. Step 6: Final answer
    x = 72,949.60

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1.5x scale

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.