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Finding the Fourth Proportional to 88,512.64, 122,055.12 and 68,372.80

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Solution

The fourth proportional to 88,512.64, 122,055.12 and 68,372.80 is: 94,283.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,512.64 : 122,055.12 = 68,372.80 : x
  2. Step 2: Convert to fraction form
    88,512.64/122,055.12 = 68,372.80/x
  3. Step 3: Cross multiply
    88,512.64x = 122,055.12 × 68,372.80
  4. Step 4: Simplify right side
    88,512.64x = 8,345,250,308.74
  5. Step 5: Solve for x
    x = 8,345,250,308.74/88,512.64
  6. Step 6: Final answer
    x = 94,283.15

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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.