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Finding the Fourth Proportional to 91,388.99, 125,836.44 and 79,994.72

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Solution

The fourth proportional to 91,388.99, 125,836.44 and 79,994.72 is: 110,147.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,388.99 : 125,836.44 = 79,994.72 : x
  2. Step 2: Convert to fraction form
    91,388.99/125,836.44 = 79,994.72/x
  3. Step 3: Cross multiply
    91,388.99x = 125,836.44 × 79,994.72
  4. Step 4: Simplify right side
    91,388.99x = 10,066,250,798.21
  5. Step 5: Solve for x
    x = 10,066,250,798.21/91,388.99
  6. Step 6: Final answer
    x = 110,147.30

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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.