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Finding the Fourth Proportional to 268,711.40, 402,969.90 and 108,720.20

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Solution

The fourth proportional to 268,711.40, 402,969.90 and 108,720.20 is: 163,040.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,711.40 : 402,969.90 = 108,720.20 : x
  2. Step 2: Convert to fraction form
    268,711.40/402,969.90 = 108,720.20/x
  3. Step 3: Cross multiply
    268,711.40x = 402,969.90 × 108,720.20
  4. Step 4: Simplify right side
    268,711.40x = 43,810,968,121.98
  5. Step 5: Solve for x
    x = 43,810,968,121.98/268,711.40
  6. Step 6: Final answer
    x = 163,040.97

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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.