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Finding the Fourth Proportional to 83,750.88, 125,630.64 and 21,421.92

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Solution

The fourth proportional to 83,750.88, 125,630.64 and 21,421.92 is: 32,133.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,750.88 : 125,630.64 = 21,421.92 : x
  2. Step 2: Convert to fraction form
    83,750.88/125,630.64 = 21,421.92/x
  3. Step 3: Cross multiply
    83,750.88x = 125,630.64 × 21,421.92
  4. Step 4: Simplify right side
    83,750.88x = 2,691,249,519.63
  5. Step 5: Solve for x
    x = 2,691,249,519.63/83,750.88
  6. Step 6: Final answer
    x = 32,133.98

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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.