Home / 80,515.30-111,215.73-61,278.22

Finding the Fourth Proportional to 80,515.30, 111,215.73 and 61,278.22

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Solution

The fourth proportional to 80,515.30, 111,215.73 and 61,278.22 is: 84,643.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,515.30 : 111,215.73 = 61,278.22 : x
  2. Step 2: Convert to fraction form
    80,515.30/111,215.73 = 61,278.22/x
  3. Step 3: Cross multiply
    80,515.30x = 111,215.73 × 61,278.22
  4. Step 4: Simplify right side
    80,515.30x = 6,815,101,970.40
  5. Step 5: Solve for x
    x = 6,815,101,970.40/80,515.30
  6. Step 6: Final answer
    x = 84,643.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.