Home / 81,215.16-121,871.94-34,468.03

Finding the Fourth Proportional to 81,215.16, 121,871.94 and 34,468.03

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Solution

The fourth proportional to 81,215.16, 121,871.94 and 34,468.03 is: 51,722.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,215.16 : 121,871.94 = 34,468.03 : x
  2. Step 2: Convert to fraction form
    81,215.16/121,871.94 = 34,468.03/x
  3. Step 3: Cross multiply
    81,215.16x = 121,871.94 × 34,468.03
  4. Step 4: Simplify right side
    81,215.16x = 4,200,685,901.05
  5. Step 5: Solve for x
    x = 4,200,685,901.05/81,215.16
  6. Step 6: Final answer
    x = 51,722.93

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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.