Home / 258,078.30-387,117.45-163,599.90

Finding the Fourth Proportional to 258,078.30, 387,117.45 and 163,599.90

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Solution

The fourth proportional to 258,078.30, 387,117.45 and 163,599.90 is: 245,399.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,078.30 : 387,117.45 = 163,599.90 : x
  2. Step 2: Convert to fraction form
    258,078.30/387,117.45 = 163,599.90/x
  3. Step 3: Cross multiply
    258,078.30x = 387,117.45 × 163,599.90
  4. Step 4: Simplify right side
    258,078.30x = 63,332,376,108.26
  5. Step 5: Solve for x
    x = 63,332,376,108.26/258,078.30
  6. Step 6: Final answer
    x = 245,399.85

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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.