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Finding the Fourth Proportional to 258,360.84, 387,332.15 and 80,776.44

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Solution

The fourth proportional to 258,360.84, 387,332.15 and 80,776.44 is: 121,099.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,360.84 : 387,332.15 = 80,776.44 : x
  2. Step 2: Convert to fraction form
    258,360.84/387,332.15 = 80,776.44/x
  3. Step 3: Cross multiply
    258,360.84x = 387,332.15 × 80,776.44
  4. Step 4: Simplify right side
    258,360.84x = 31,287,311,770.66
  5. Step 5: Solve for x
    x = 31,287,311,770.66/258,360.84
  6. Step 6: Final answer
    x = 121,099.28

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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.