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Finding the Fourth Proportional to 87,123.50, 120,211.92 and 51,300.44

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Solution

The fourth proportional to 87,123.50, 120,211.92 and 51,300.44 is: 70,783.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,123.50 : 120,211.92 = 51,300.44 : x
  2. Step 2: Convert to fraction form
    87,123.50/120,211.92 = 51,300.44/x
  3. Step 3: Cross multiply
    87,123.50x = 120,211.92 × 51,300.44
  4. Step 4: Simplify right side
    87,123.50x = 6,166,924,389.24
  5. Step 5: Solve for x
    x = 6,166,924,389.24/87,123.50
  6. Step 6: Final answer
    x = 70,783.71

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1.5x scale

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.