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Finding the Fourth Proportional to 77,388.70, 106,797.59 and 45,122.42

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Solution

The fourth proportional to 77,388.70, 106,797.59 and 45,122.42 is: 62,269.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,388.70 : 106,797.59 = 45,122.42 : x
  2. Step 2: Convert to fraction form
    77,388.70/106,797.59 = 45,122.42/x
  3. Step 3: Cross multiply
    77,388.70x = 106,797.59 × 45,122.42
  4. Step 4: Simplify right side
    77,388.70x = 4,818,965,710.97
  5. Step 5: Solve for x
    x = 4,818,965,710.97/77,388.70
  6. Step 6: Final answer
    x = 62,269.63

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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.