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Finding the Fourth Proportional to 268,718.40, 402,980.40 and 108,727.20

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Solution

The fourth proportional to 268,718.40, 402,980.40 and 108,727.20 is: 163,051.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,718.40 : 402,980.40 = 108,727.20 : x
  2. Step 2: Convert to fraction form
    268,718.40/402,980.40 = 108,727.20/x
  3. Step 3: Cross multiply
    268,718.40x = 402,980.40 × 108,727.20
  4. Step 4: Simplify right side
    268,718.40x = 43,814,930,546.88
  5. Step 5: Solve for x
    x = 43,814,930,546.88/268,718.40
  6. Step 6: Final answer
    x = 163,051.47

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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.