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Finding the Fourth Proportional to 87,630.50, 120,788.42 and 68,477.00

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Solution

The fourth proportional to 87,630.50, 120,788.42 and 68,477.00 is: 94,387.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,630.50 : 120,788.42 = 68,477.00 : x
  2. Step 2: Convert to fraction form
    87,630.50/120,788.42 = 68,477.00/x
  3. Step 3: Cross multiply
    87,630.50x = 120,788.42 × 68,477.00
  4. Step 4: Simplify right side
    87,630.50x = 8,271,228,203.59
  5. Step 5: Solve for x
    x = 8,271,228,203.59/87,630.50
  6. Step 6: Final answer
    x = 94,387.55

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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.