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Finding the Fourth Proportional to 258,495.68, 387,743.58 and 81,002.66

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Solution

The fourth proportional to 258,495.68, 387,743.58 and 81,002.66 is: 121,504.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,495.68 : 387,743.58 = 81,002.66 : x
  2. Step 2: Convert to fraction form
    258,495.68/387,743.58 = 81,002.66/x
  3. Step 3: Cross multiply
    258,495.68x = 387,743.58 × 81,002.66
  4. Step 4: Simplify right side
    258,495.68x = 31,408,261,377.92
  5. Step 5: Solve for x
    x = 31,408,261,377.92/258,495.68
  6. Step 6: Final answer
    x = 121,504.01

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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.