Home / 86,857.20-130,504.50-55,281.78

Finding the Fourth Proportional to 86,857.20, 130,504.50 and 55,281.78

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Solution

The fourth proportional to 86,857.20, 130,504.50 and 55,281.78 is: 83,061.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,857.20 : 130,504.50 = 55,281.78 : x
  2. Step 2: Convert to fraction form
    86,857.20/130,504.50 = 55,281.78/x
  3. Step 3: Cross multiply
    86,857.20x = 130,504.50 × 55,281.78
  4. Step 4: Simplify right side
    86,857.20x = 7,214,521,058.01
  5. Step 5: Solve for x
    x = 7,214,521,058.01/86,857.20
  6. Step 6: Final answer
    x = 83,061.87

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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.