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Finding the Fourth Proportional to 81,168.32, 112,043.52 and 72,655.44

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Solution

The fourth proportional to 81,168.32, 112,043.52 and 72,655.44 is: 100,292.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,168.32 : 112,043.52 = 72,655.44 : x
  2. Step 2: Convert to fraction form
    81,168.32/112,043.52 = 72,655.44/x
  3. Step 3: Cross multiply
    81,168.32x = 112,043.52 × 72,655.44
  4. Step 4: Simplify right side
    81,168.32x = 8,140,571,244.75
  5. Step 5: Solve for x
    x = 8,140,571,244.75/81,168.32
  6. Step 6: Final answer
    x = 100,292.47

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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.