Home / 143,781.33-198,419.02-83,387.78

Finding the Fourth Proportional to 143,781.33, 198,419.02 and 83,387.78

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Solution

The fourth proportional to 143,781.33, 198,419.02 and 83,387.78 is: 115,075.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,781.33 : 198,419.02 = 83,387.78 : x
  2. Step 2: Convert to fraction form
    143,781.33/198,419.02 = 83,387.78/x
  3. Step 3: Cross multiply
    143,781.33x = 198,419.02 × 83,387.78
  4. Step 4: Simplify right side
    143,781.33x = 16,545,720,602.69
  5. Step 5: Solve for x
    x = 16,545,720,602.69/143,781.33
  6. Step 6: Final answer
    x = 115,075.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.