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Finding the Fourth Proportional to 199,637.70, 299,456.55 and 120,905.70

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Solution

The fourth proportional to 199,637.70, 299,456.55 and 120,905.70 is: 181,358.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,637.70 : 299,456.55 = 120,905.70 : x
  2. Step 2: Convert to fraction form
    199,637.70/299,456.55 = 120,905.70/x
  3. Step 3: Cross multiply
    199,637.70x = 299,456.55 × 120,905.70
  4. Step 4: Simplify right side
    199,637.70x = 36,206,003,797.34
  5. Step 5: Solve for x
    x = 36,206,003,797.34/199,637.70
  6. Step 6: Final answer
    x = 181,358.55

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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.