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Finding the Fourth Proportional to 231,344.80, 346,498.80 and 138,032.80

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Solution

The fourth proportional to 231,344.80, 346,498.80 and 138,032.80 is: 206,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,344.80 : 346,498.80 = 138,032.80 : x
  2. Step 2: Convert to fraction form
    231,344.80/346,498.80 = 138,032.80/x
  3. Step 3: Cross multiply
    231,344.80x = 346,498.80 × 138,032.80
  4. Step 4: Simplify right side
    231,344.80x = 47,828,199,560.64
  5. Step 5: Solve for x
    x = 47,828,199,560.64/231,344.80
  6. Step 6: Final answer
    x = 206,739.89

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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.