Home / 199,987.40-299,997.07-66,868.36

Finding the Fourth Proportional to 199,987.40, 299,997.07 and 66,868.36

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Solution

The fourth proportional to 199,987.40, 299,997.07 and 66,868.36 is: 100,307.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,987.40 : 299,997.07 = 66,868.36 : x
  2. Step 2: Convert to fraction form
    199,987.40/299,997.07 = 66,868.36/x
  3. Step 3: Cross multiply
    199,987.40x = 299,997.07 × 66,868.36
  4. Step 4: Simplify right side
    199,987.40x = 20,060,311,158.54
  5. Step 5: Solve for x
    x = 20,060,311,158.54/199,987.40
  6. Step 6: Final answer
    x = 100,307.87

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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.