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Finding the Fourth Proportional to 85,891.32, 128,840.64 and 23,561.82

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Solution

The fourth proportional to 85,891.32, 128,840.64 and 23,561.82 is: 35,343.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,891.32 : 128,840.64 = 23,561.82 : x
  2. Step 2: Convert to fraction form
    85,891.32/128,840.64 = 23,561.82/x
  3. Step 3: Cross multiply
    85,891.32x = 128,840.64 × 23,561.82
  4. Step 4: Simplify right side
    85,891.32x = 3,035,719,968.36
  5. Step 5: Solve for x
    x = 3,035,719,968.36/85,891.32
  6. Step 6: Final answer
    x = 35,343.73

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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.