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Finding the Fourth Proportional to 79,085.60, 109,137.16 and 43,275.20

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Solution

The fourth proportional to 79,085.60, 109,137.16 and 43,275.20 is: 59,719.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,085.60 : 109,137.16 = 43,275.20 : x
  2. Step 2: Convert to fraction form
    79,085.60/109,137.16 = 43,275.20/x
  3. Step 3: Cross multiply
    79,085.60x = 109,137.16 × 43,275.20
  4. Step 4: Simplify right side
    79,085.60x = 4,722,932,426.43
  5. Step 5: Solve for x
    x = 4,722,932,426.43/79,085.60
  6. Step 6: Final answer
    x = 59,719.25

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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.