Home / 258,253.14-387,409.20-68,721.35

Finding the Fourth Proportional to 258,253.14, 387,409.20 and 68,721.35

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Solution

The fourth proportional to 258,253.14, 387,409.20 and 68,721.35 is: 103,089.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,253.14 : 387,409.20 = 68,721.35 : x
  2. Step 2: Convert to fraction form
    258,253.14/387,409.20 = 68,721.35/x
  3. Step 3: Cross multiply
    258,253.14x = 387,409.20 × 68,721.35
  4. Step 4: Simplify right side
    258,253.14x = 26,623,281,031.67
  5. Step 5: Solve for x
    x = 26,623,281,031.67/258,253.14
  6. Step 6: Final answer
    x = 103,089.86

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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.