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Finding the Fourth Proportional to 91,164.78, 136,798.20 and 38,613.60

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Solution

The fourth proportional to 91,164.78, 136,798.20 and 38,613.60 is: 57,942.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,164.78 : 136,798.20 = 38,613.60 : x
  2. Step 2: Convert to fraction form
    91,164.78/136,798.20 = 38,613.60/x
  3. Step 3: Cross multiply
    91,164.78x = 136,798.20 × 38,613.60
  4. Step 4: Simplify right side
    91,164.78x = 5,282,270,975.52
  5. Step 5: Solve for x
    x = 5,282,270,975.52/91,164.78
  6. Step 6: Final answer
    x = 57,942.01

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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.