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Finding the Fourth Proportional to 258,332.29, 387,505.77 and 71,343.79

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Solution

The fourth proportional to 258,332.29, 387,505.77 and 71,343.79 is: 107,017.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,332.29 : 387,505.77 = 71,343.79 : x
  2. Step 2: Convert to fraction form
    258,332.29/387,505.77 = 71,343.79/x
  3. Step 3: Cross multiply
    258,332.29x = 387,505.77 × 71,343.79
  4. Step 4: Simplify right side
    258,332.29x = 27,646,130,278.67
  5. Step 5: Solve for x
    x = 27,646,130,278.67/258,332.29
  6. Step 6: Final answer
    x = 107,017.71

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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.