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Finding the Fourth Proportional to 91,168.93, 136,800.78 and 68,975.74

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Solution

The fourth proportional to 91,168.93, 136,800.78 and 68,975.74 is: 103,499.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,168.93 : 136,800.78 = 68,975.74 : x
  2. Step 2: Convert to fraction form
    91,168.93/136,800.78 = 68,975.74/x
  3. Step 3: Cross multiply
    91,168.93x = 136,800.78 × 68,975.74
  4. Step 4: Simplify right side
    91,168.93x = 9,435,935,033.08
  5. Step 5: Solve for x
    x = 9,435,935,033.08/91,168.93
  6. Step 6: Final answer
    x = 103,499.46

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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.