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Finding the Fourth Proportional to 99,712.20, 149,203.80 and 73,468.20

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Solution

The fourth proportional to 99,712.20, 149,203.80 and 73,468.20 is: 109,933.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,712.20 : 149,203.80 = 73,468.20 : x
  2. Step 2: Convert to fraction form
    99,712.20/149,203.80 = 73,468.20/x
  3. Step 3: Cross multiply
    99,712.20x = 149,203.80 × 73,468.20
  4. Step 4: Simplify right side
    99,712.20x = 10,961,734,619.16
  5. Step 5: Solve for x
    x = 10,961,734,619.16/99,712.20
  6. Step 6: Final answer
    x = 109,933.74

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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.