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Finding the Fourth Proportional to 268,340.10, 402,510.15 and 81,351.54

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Solution

The fourth proportional to 268,340.10, 402,510.15 and 81,351.54 is: 122,027.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,340.10 : 402,510.15 = 81,351.54 : x
  2. Step 2: Convert to fraction form
    268,340.10/402,510.15 = 81,351.54/x
  3. Step 3: Cross multiply
    268,340.10x = 402,510.15 × 81,351.54
  4. Step 4: Simplify right side
    268,340.10x = 32,744,820,568.13
  5. Step 5: Solve for x
    x = 32,744,820,568.13/268,340.10
  6. Step 6: Final answer
    x = 122,027.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.