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Finding the Fourth Proportional to 99,979, 150,042.70 and 47,388.60

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Solution

The fourth proportional to 99,979, 150,042.70 and 47,388.60 is: 71,118.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,979 : 150,042.70 = 47,388.60 : x
  2. Step 2: Convert to fraction form
    99,979/150,042.70 = 47,388.60/x
  3. Step 3: Cross multiply
    99,979x = 150,042.70 × 47,388.60
  4. Step 4: Simplify right side
    99,979x = 7,110,313,493.22
  5. Step 5: Solve for x
    x = 7,110,313,493.22/99,979
  6. Step 6: Final answer
    x = 71,118.07

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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.