Home / 258,215.81-387,385.99-89,711.61

Finding the Fourth Proportional to 258,215.81, 387,385.99 and 89,711.61

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Solution

The fourth proportional to 258,215.81, 387,385.99 and 89,711.61 is: 134,589.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,215.81 : 387,385.99 = 89,711.61 : x
  2. Step 2: Convert to fraction form
    258,215.81/387,385.99 = 89,711.61/x
  3. Step 3: Cross multiply
    258,215.81x = 387,385.99 × 89,711.61
  4. Step 4: Simplify right side
    258,215.81x = 34,753,021,374.25
  5. Step 5: Solve for x
    x = 34,753,021,374.25/258,215.81
  6. Step 6: Final answer
    x = 134,589.05

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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.