Home / 85,738.66-128,561.01-26,557.90

Finding the Fourth Proportional to 85,738.66, 128,561.01 and 26,557.90

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Solution

The fourth proportional to 85,738.66, 128,561.01 and 26,557.90 is: 39,822.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,738.66 : 128,561.01 = 26,557.90 : x
  2. Step 2: Convert to fraction form
    85,738.66/128,561.01 = 26,557.90/x
  3. Step 3: Cross multiply
    85,738.66x = 128,561.01 × 26,557.90
  4. Step 4: Simplify right side
    85,738.66x = 3,414,310,447.48
  5. Step 5: Solve for x
    x = 3,414,310,447.48/85,738.66
  6. Step 6: Final answer
    x = 39,822.30

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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.