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Finding the Fourth Proportional to 86,512, 119,278.41 and 72,192.43

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Solution

The fourth proportional to 86,512, 119,278.41 and 72,192.43 is: 99,535.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,512 : 119,278.41 = 72,192.43 : x
  2. Step 2: Convert to fraction form
    86,512/119,278.41 = 72,192.43/x
  3. Step 3: Cross multiply
    86,512x = 119,278.41 × 72,192.43
  4. Step 4: Simplify right side
    86,512x = 8,610,998,264.44
  5. Step 5: Solve for x
    x = 8,610,998,264.44/86,512
  6. Step 6: Final answer
    x = 99,535.30

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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.