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Finding the Fourth Proportional to 51,129.78, 76,713.12 and 17,854.76

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Solution

The fourth proportional to 51,129.78, 76,713.12 and 17,854.76 is: 26,788.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,129.78 : 76,713.12 = 17,854.76 : x
  2. Step 2: Convert to fraction form
    51,129.78/76,713.12 = 17,854.76/x
  3. Step 3: Cross multiply
    51,129.78x = 76,713.12 × 17,854.76
  4. Step 4: Simplify right side
    51,129.78x = 1,369,693,962.89
  5. Step 5: Solve for x
    x = 1,369,693,962.89/51,129.78
  6. Step 6: Final answer
    x = 26,788.58

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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.