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Finding the Fourth Proportional to 258,420.71, 387,600.21 and 68,895.29

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Solution

The fourth proportional to 258,420.71, 387,600.21 and 68,895.29 is: 103,334.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,420.71 : 387,600.21 = 68,895.29 : x
  2. Step 2: Convert to fraction form
    258,420.71/387,600.21 = 68,895.29/x
  3. Step 3: Cross multiply
    258,420.71x = 387,600.21 × 68,895.29
  4. Step 4: Simplify right side
    258,420.71x = 26,703,826,934.01
  5. Step 5: Solve for x
    x = 26,703,826,934.01/258,420.71
  6. Step 6: Final answer
    x = 103,334.70

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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.