Home / 258,117.44-387,217.20-89,689.28

Finding the Fourth Proportional to 258,117.44, 387,217.20 and 89,689.28

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Solution

The fourth proportional to 258,117.44, 387,217.20 and 89,689.28 is: 134,548.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,117.44 : 387,217.20 = 89,689.28 : x
  2. Step 2: Convert to fraction form
    258,117.44/387,217.20 = 89,689.28/x
  3. Step 3: Cross multiply
    258,117.44x = 387,217.20 × 89,689.28
  4. Step 4: Simplify right side
    258,117.44x = 34,729,231,871.62
  5. Step 5: Solve for x
    x = 34,729,231,871.62/258,117.44
  6. Step 6: Final answer
    x = 134,548.18

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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.