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Finding the Fourth Proportional to 268,720.40, 402,983.40 and 108,729.20

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Solution

The fourth proportional to 268,720.40, 402,983.40 and 108,729.20 is: 163,054.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,720.40 : 402,983.40 = 108,729.20 : x
  2. Step 2: Convert to fraction form
    268,720.40/402,983.40 = 108,729.20/x
  3. Step 3: Cross multiply
    268,720.40x = 402,983.40 × 108,729.20
  4. Step 4: Simplify right side
    268,720.40x = 43,816,062,695.28
  5. Step 5: Solve for x
    x = 43,816,062,695.28/268,720.40
  6. Step 6: Final answer
    x = 163,054.47

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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.