Home / 86,581.20-129,871.80-47,215.20

Finding the Fourth Proportional to 86,581.20, 129,871.80 and 47,215.20

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Solution

The fourth proportional to 86,581.20, 129,871.80 and 47,215.20 is: 70,822.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,581.20 : 129,871.80 = 47,215.20 : x
  2. Step 2: Convert to fraction form
    86,581.20/129,871.80 = 47,215.20/x
  3. Step 3: Cross multiply
    86,581.20x = 129,871.80 × 47,215.20
  4. Step 4: Simplify right side
    86,581.20x = 6,131,923,011.36
  5. Step 5: Solve for x
    x = 6,131,923,011.36/86,581.20
  6. Step 6: Final answer
    x = 70,822.80

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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.