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Finding the Fourth Proportional to 268,449.19, 402,676.21 and 81,460.69

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Solution

The fourth proportional to 268,449.19, 402,676.21 and 81,460.69 is: 122,191.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,449.19 : 402,676.21 = 81,460.69 : x
  2. Step 2: Convert to fraction form
    268,449.19/402,676.21 = 81,460.69/x
  3. Step 3: Cross multiply
    268,449.19x = 402,676.21 × 81,460.69
  4. Step 4: Simplify right side
    268,449.19x = 32,802,281,008.32
  5. Step 5: Solve for x
    x = 32,802,281,008.32/268,449.19
  6. Step 6: Final answer
    x = 122,191.77

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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.