Home / 258,468.42-387,721.12-68,927.78

Finding the Fourth Proportional to 258,468.42, 387,721.12 and 68,927.78

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Solution

The fourth proportional to 258,468.42, 387,721.12 and 68,927.78 is: 103,396.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,468.42 : 387,721.12 = 68,927.78 : x
  2. Step 2: Convert to fraction form
    258,468.42/387,721.12 = 68,927.78/x
  3. Step 3: Cross multiply
    258,468.42x = 387,721.12 × 68,927.78
  4. Step 4: Simplify right side
    258,468.42x = 26,724,756,060.71
  5. Step 5: Solve for x
    x = 26,724,756,060.71/258,468.42
  6. Step 6: Final answer
    x = 103,396.60

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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.