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Finding the Fourth Proportional to 81,191.54, 111,447.82 and 72,038.94

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Solution

The fourth proportional to 81,191.54, 111,447.82 and 72,038.94 is: 98,884.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,191.54 : 111,447.82 = 72,038.94 : x
  2. Step 2: Convert to fraction form
    81,191.54/111,447.82 = 72,038.94/x
  3. Step 3: Cross multiply
    81,191.54x = 111,447.82 × 72,038.94
  4. Step 4: Simplify right side
    81,191.54x = 8,028,582,818.11
  5. Step 5: Solve for x
    x = 8,028,582,818.11/81,191.54
  6. Step 6: Final answer
    x = 98,884.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.