Home / 221,077.28-331,686.02-78,919.51

Finding the Fourth Proportional to 221,077.28, 331,686.02 and 78,919.51

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Solution

The fourth proportional to 221,077.28, 331,686.02 and 78,919.51 is: 118,404.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,077.28 : 331,686.02 = 78,919.51 : x
  2. Step 2: Convert to fraction form
    221,077.28/331,686.02 = 78,919.51/x
  3. Step 3: Cross multiply
    221,077.28x = 331,686.02 × 78,919.51
  4. Step 4: Simplify right side
    221,077.28x = 26,176,498,172.25
  5. Step 5: Solve for x
    x = 26,176,498,172.25/221,077.28
  6. Step 6: Final answer
    x = 118,404.29

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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.