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Finding the Fourth Proportional to 91,601.94, 137,199.90 and 70,385.81

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Solution

The fourth proportional to 91,601.94, 137,199.90 and 70,385.81 is: 105,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,601.94 : 137,199.90 = 70,385.81 : x
  2. Step 2: Convert to fraction form
    91,601.94/137,199.90 = 70,385.81/x
  3. Step 3: Cross multiply
    91,601.94x = 137,199.90 × 70,385.81
  4. Step 4: Simplify right side
    91,601.94x = 9,656,926,245.16
  5. Step 5: Solve for x
    x = 9,656,926,245.16/91,601.94
  6. Step 6: Final answer
    x = 105,422.73

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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.