Home / 81,789.28-122,683.88-26,385.28

Finding the Fourth Proportional to 81,789.28, 122,683.88 and 26,385.28

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Solution

The fourth proportional to 81,789.28, 122,683.88 and 26,385.28 is: 39,577.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,789.28 : 122,683.88 = 26,385.28 : x
  2. Step 2: Convert to fraction form
    81,789.28/122,683.88 = 26,385.28/x
  3. Step 3: Cross multiply
    81,789.28x = 122,683.88 × 26,385.28
  4. Step 4: Simplify right side
    81,789.28x = 3,237,048,525.29
  5. Step 5: Solve for x
    x = 3,237,048,525.29/81,789.28
  6. Step 6: Final answer
    x = 39,577.91

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1.5x scale

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.