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Finding the Fourth Proportional to 85,772.88, 128,655.36 and 23,443.20

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Solution

The fourth proportional to 85,772.88, 128,655.36 and 23,443.20 is: 35,163.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,772.88 : 128,655.36 = 23,443.20 : x
  2. Step 2: Convert to fraction form
    85,772.88/128,655.36 = 23,443.20/x
  3. Step 3: Cross multiply
    85,772.88x = 128,655.36 × 23,443.20
  4. Step 4: Simplify right side
    85,772.88x = 3,016,093,335.55
  5. Step 5: Solve for x
    x = 3,016,093,335.55/85,772.88
  6. Step 6: Final answer
    x = 35,163.72

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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.