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Finding the Fourth Proportional to 84,031.60, 125,893.80 and 68,364.40

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Solution

The fourth proportional to 84,031.60, 125,893.80 and 68,364.40 is: 102,421.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,031.60 : 125,893.80 = 68,364.40 : x
  2. Step 2: Convert to fraction form
    84,031.60/125,893.80 = 68,364.40/x
  3. Step 3: Cross multiply
    84,031.60x = 125,893.80 × 68,364.40
  4. Step 4: Simplify right side
    84,031.60x = 8,606,654,100.72
  5. Step 5: Solve for x
    x = 8,606,654,100.72/84,031.60
  6. Step 6: Final answer
    x = 102,421.64

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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.