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Finding the Fourth Proportional to 199,991.80, 299,987.70 and 180,638.20

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Solution

The fourth proportional to 199,991.80, 299,987.70 and 180,638.20 is: 270,957.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,991.80 : 299,987.70 = 180,638.20 : x
  2. Step 2: Convert to fraction form
    199,991.80/299,987.70 = 180,638.20/x
  3. Step 3: Cross multiply
    199,991.80x = 299,987.70 × 180,638.20
  4. Step 4: Simplify right side
    199,991.80x = 54,189,238,150.14
  5. Step 5: Solve for x
    x = 54,189,238,150.14/199,991.80
  6. Step 6: Final answer
    x = 270,957.30

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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.