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Finding the Fourth Proportional to 91,159.36, 125,737.78 and 79,201.60

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Solution

The fourth proportional to 91,159.36, 125,737.78 and 79,201.60 is: 109,244.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,159.36 : 125,737.78 = 79,201.60 : x
  2. Step 2: Convert to fraction form
    91,159.36/125,737.78 = 79,201.60/x
  3. Step 3: Cross multiply
    91,159.36x = 125,737.78 × 79,201.60
  4. Step 4: Simplify right side
    91,159.36x = 9,958,633,356.45
  5. Step 5: Solve for x
    x = 9,958,633,356.45/91,159.36
  6. Step 6: Final answer
    x = 109,244.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.