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Finding the Fourth Proportional to 79,088.64, 109,137.60 and 43,272

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Solution

The fourth proportional to 79,088.64, 109,137.60 and 43,272 is: 59,712.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,088.64 : 109,137.60 = 43,272 : x
  2. Step 2: Convert to fraction form
    79,088.64/109,137.60 = 43,272/x
  3. Step 3: Cross multiply
    79,088.64x = 109,137.60 × 43,272
  4. Step 4: Simplify right side
    79,088.64x = 4,722,602,227.20
  5. Step 5: Solve for x
    x = 4,722,602,227.20/79,088.64
  6. Step 6: Final answer
    x = 59,712.78

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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.