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Finding the Fourth Proportional to 268,451.69, 402,679.96 and 81,463.19

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Solution

The fourth proportional to 268,451.69, 402,679.96 and 81,463.19 is: 122,195.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,451.69 : 402,679.96 = 81,463.19 : x
  2. Step 2: Convert to fraction form
    268,451.69/402,679.96 = 81,463.19/x
  3. Step 3: Cross multiply
    268,451.69x = 402,679.96 × 81,463.19
  4. Step 4: Simplify right side
    268,451.69x = 32,803,594,090.67
  5. Step 5: Solve for x
    x = 32,803,594,090.67/268,451.69
  6. Step 6: Final answer
    x = 122,195.52

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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.