Home / 90,938.15-136,280.79-79,067.60

Finding the Fourth Proportional to 90,938.15, 136,280.79 and 79,067.60

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Solution

The fourth proportional to 90,938.15, 136,280.79 and 79,067.60 is: 118,491.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,938.15 : 136,280.79 = 79,067.60 : x
  2. Step 2: Convert to fraction form
    90,938.15/136,280.79 = 79,067.60/x
  3. Step 3: Cross multiply
    90,938.15x = 136,280.79 × 79,067.60
  4. Step 4: Simplify right side
    90,938.15x = 10,775,394,991.40
  5. Step 5: Solve for x
    x = 10,775,394,991.40/90,938.15
  6. Step 6: Final answer
    x = 118,491.47

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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.