Home / 143,781.05-198,418.64-83,387.51

Finding the Fourth Proportional to 143,781.05, 198,418.64 and 83,387.51

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Solution

The fourth proportional to 143,781.05, 198,418.64 and 83,387.51 is: 115,075.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,781.05 : 198,418.64 = 83,387.51 : x
  2. Step 2: Convert to fraction form
    143,781.05/198,418.64 = 83,387.51/x
  3. Step 3: Cross multiply
    143,781.05x = 198,418.64 × 83,387.51
  4. Step 4: Simplify right side
    143,781.05x = 16,545,635,335.09
  5. Step 5: Solve for x
    x = 16,545,635,335.09/143,781.05
  6. Step 6: Final answer
    x = 115,075.22

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1.5x scale

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.