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Finding the Fourth Proportional to 86,692.65, 130,076.54 and 30,572.86

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Solution

The fourth proportional to 86,692.65, 130,076.54 and 30,572.86 is: 45,872.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,692.65 : 130,076.54 = 30,572.86 : x
  2. Step 2: Convert to fraction form
    86,692.65/130,076.54 = 30,572.86/x
  3. Step 3: Cross multiply
    86,692.65x = 130,076.54 × 30,572.86
  4. Step 4: Simplify right side
    86,692.65x = 3,976,811,846.70
  5. Step 5: Solve for x
    x = 3,976,811,846.70/86,692.65
  6. Step 6: Final answer
    x = 45,872.54

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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.