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Finding the Fourth Proportional to 73,189.80, 109,784.70 and 38,124.90

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Solution

The fourth proportional to 73,189.80, 109,784.70 and 38,124.90 is: 57,187.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,189.80 : 109,784.70 = 38,124.90 : x
  2. Step 2: Convert to fraction form
    73,189.80/109,784.70 = 38,124.90/x
  3. Step 3: Cross multiply
    73,189.80x = 109,784.70 × 38,124.90
  4. Step 4: Simplify right side
    73,189.80x = 4,185,530,709.03
  5. Step 5: Solve for x
    x = 4,185,530,709.03/73,189.80
  6. Step 6: Final answer
    x = 57,187.35

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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.