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Finding the Fourth Proportional to 89,906.40, 134,859.60 and 72,993.60

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Solution

The fourth proportional to 89,906.40, 134,859.60 and 72,993.60 is: 109,490.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,906.40 : 134,859.60 = 72,993.60 : x
  2. Step 2: Convert to fraction form
    89,906.40/134,859.60 = 72,993.60/x
  3. Step 3: Cross multiply
    89,906.40x = 134,859.60 × 72,993.60
  4. Step 4: Simplify right side
    89,906.40x = 9,843,887,698.56
  5. Step 5: Solve for x
    x = 9,843,887,698.56/89,906.40
  6. Step 6: Final answer
    x = 109,490.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.