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Finding the Fourth Proportional to 91,212.48, 125,839.98 and 53,479.44

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Solution

The fourth proportional to 91,212.48, 125,839.98 and 53,479.44 is: 73,782.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,212.48 : 125,839.98 = 53,479.44 : x
  2. Step 2: Convert to fraction form
    91,212.48/125,839.98 = 53,479.44/x
  3. Step 3: Cross multiply
    91,212.48x = 125,839.98 × 53,479.44
  4. Step 4: Simplify right side
    91,212.48x = 6,729,851,660.01
  5. Step 5: Solve for x
    x = 6,729,851,660.01/91,212.48
  6. Step 6: Final answer
    x = 73,782.14

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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.