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Finding the Fourth Proportional to 45,431.66, 68,128.02 and 15,840.74

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Solution

The fourth proportional to 45,431.66, 68,128.02 and 15,840.74 is: 23,754.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,431.66 : 68,128.02 = 15,840.74 : x
  2. Step 2: Convert to fraction form
    45,431.66/68,128.02 = 15,840.74/x
  3. Step 3: Cross multiply
    45,431.66x = 68,128.02 × 15,840.74
  4. Step 4: Simplify right side
    45,431.66x = 1,079,198,251.53
  5. Step 5: Solve for x
    x = 1,079,198,251.53/45,431.66
  6. Step 6: Final answer
    x = 23,754.32

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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.