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Finding the Fourth Proportional to 87,886.50, 121,289.85 and 54,358.98

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Solution

The fourth proportional to 87,886.50, 121,289.85 and 54,358.98 is: 75,019.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,886.50 : 121,289.85 = 54,358.98 : x
  2. Step 2: Convert to fraction form
    87,886.50/121,289.85 = 54,358.98/x
  3. Step 3: Cross multiply
    87,886.50x = 121,289.85 × 54,358.98
  4. Step 4: Simplify right side
    87,886.50x = 6,593,192,530.35
  5. Step 5: Solve for x
    x = 6,593,192,530.35/87,886.50
  6. Step 6: Final answer
    x = 75,019.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.