Home / 258,195.70-387,134.99-89,643.61

Finding the Fourth Proportional to 258,195.70, 387,134.99 and 89,643.61

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Solution

The fourth proportional to 258,195.70, 387,134.99 and 89,643.61 is: 134,410.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,195.70 : 387,134.99 = 89,643.61 : x
  2. Step 2: Convert to fraction form
    258,195.70/387,134.99 = 89,643.61/x
  3. Step 3: Cross multiply
    258,195.70x = 387,134.99 × 89,643.61
  4. Step 4: Simplify right side
    258,195.70x = 34,704,178,937.02
  5. Step 5: Solve for x
    x = 34,704,178,937.02/258,195.70
  6. Step 6: Final answer
    x = 134,410.37

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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.