Home / 91,078.11-136,607.40-28,743.75

Finding the Fourth Proportional to 91,078.11, 136,607.40 and 28,743.75

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Solution

The fourth proportional to 91,078.11, 136,607.40 and 28,743.75 is: 43,112.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,078.11 : 136,607.40 = 28,743.75 : x
  2. Step 2: Convert to fraction form
    91,078.11/136,607.40 = 28,743.75/x
  3. Step 3: Cross multiply
    91,078.11x = 136,607.40 × 28,743.75
  4. Step 4: Simplify right side
    91,078.11x = 3,926,608,953.75
  5. Step 5: Solve for x
    x = 3,926,608,953.75/91,078.11
  6. Step 6: Final answer
    x = 43,112.54

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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.