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Finding the Fourth Proportional to 91,620.28, 137,450.02 and 28,439.02

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Solution

The fourth proportional to 91,620.28, 137,450.02 and 28,439.02 is: 42,664.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,620.28 : 137,450.02 = 28,439.02 : x
  2. Step 2: Convert to fraction form
    91,620.28/137,450.02 = 28,439.02/x
  3. Step 3: Cross multiply
    91,620.28x = 137,450.02 × 28,439.02
  4. Step 4: Simplify right side
    91,620.28x = 3,908,943,867.78
  5. Step 5: Solve for x
    x = 3,908,943,867.78/91,620.28
  6. Step 6: Final answer
    x = 42,664.61

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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.