Home / 199,988.40-299,998.57-66,869.36

Finding the Fourth Proportional to 199,988.40, 299,998.57 and 66,869.36

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Solution

The fourth proportional to 199,988.40, 299,998.57 and 66,869.36 is: 100,309.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,988.40 : 299,998.57 = 66,869.36 : x
  2. Step 2: Convert to fraction form
    199,988.40/299,998.57 = 66,869.36/x
  3. Step 3: Cross multiply
    199,988.40x = 299,998.57 × 66,869.36
  4. Step 4: Simplify right side
    199,988.40x = 20,060,712,376.82
  5. Step 5: Solve for x
    x = 20,060,712,376.82/199,988.40
  6. Step 6: Final answer
    x = 100,309.38

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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.