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Finding the Fourth Proportional to 99,480.25, 137,282.79 and 54,768.25

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Solution

The fourth proportional to 99,480.25, 137,282.79 and 54,768.25 is: 75,580.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,480.25 : 137,282.79 = 54,768.25 : x
  2. Step 2: Convert to fraction form
    99,480.25/137,282.79 = 54,768.25/x
  3. Step 3: Cross multiply
    99,480.25x = 137,282.79 × 54,768.25
  4. Step 4: Simplify right side
    99,480.25x = 7,518,738,163.42
  5. Step 5: Solve for x
    x = 7,518,738,163.42/99,480.25
  6. Step 6: Final answer
    x = 75,580.21

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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.