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Finding the Fourth Proportional to 109,645.70, 151,446 and 79,383.08

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Solution

The fourth proportional to 109,645.70, 151,446 and 79,383.08 is: 109,646.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,645.70 : 151,446 = 79,383.08 : x
  2. Step 2: Convert to fraction form
    109,645.70/151,446 = 79,383.08/x
  3. Step 3: Cross multiply
    109,645.70x = 151,446 × 79,383.08
  4. Step 4: Simplify right side
    109,645.70x = 12,022,249,933.68
  5. Step 5: Solve for x
    x = 12,022,249,933.68/109,645.70
  6. Step 6: Final answer
    x = 109,646.34

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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.