Home / 123,913.80-171,028.40-81,476.28

Finding the Fourth Proportional to 123,913.80, 171,028.40 and 81,476.28

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Solution

The fourth proportional to 123,913.80, 171,028.40 and 81,476.28 is: 112,455.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,913.80 : 171,028.40 = 81,476.28 : x
  2. Step 2: Convert to fraction form
    123,913.80/171,028.40 = 81,476.28/x
  3. Step 3: Cross multiply
    123,913.80x = 171,028.40 × 81,476.28
  4. Step 4: Simplify right side
    123,913.80x = 13,934,757,398.97
  5. Step 5: Solve for x
    x = 13,934,757,398.97/123,913.80
  6. Step 6: Final answer
    x = 112,455.25

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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.