Home / 258,630.85-387,945.91-81,151.71

Finding the Fourth Proportional to 258,630.85, 387,945.91 and 81,151.71

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Solution

The fourth proportional to 258,630.85, 387,945.91 and 81,151.71 is: 121,727.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,630.85 : 387,945.91 = 81,151.71 : x
  2. Step 2: Convert to fraction form
    258,630.85/387,945.91 = 81,151.71/x
  3. Step 3: Cross multiply
    258,630.85x = 387,945.91 × 81,151.71
  4. Step 4: Simplify right side
    258,630.85x = 31,482,473,984.01
  5. Step 5: Solve for x
    x = 31,482,473,984.01/258,630.85
  6. Step 6: Final answer
    x = 121,727.45

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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.