Home / 123,835.80-170,920.62-81,398.28

Finding the Fourth Proportional to 123,835.80, 170,920.62 and 81,398.28

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Solution

The fourth proportional to 123,835.80, 170,920.62 and 81,398.28 is: 112,347.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,835.80 : 170,920.62 = 81,398.28 : x
  2. Step 2: Convert to fraction form
    123,835.80/170,920.62 = 81,398.28/x
  3. Step 3: Cross multiply
    123,835.80x = 170,920.62 × 81,398.28
  4. Step 4: Simplify right side
    123,835.80x = 13,912,644,484.53
  5. Step 5: Solve for x
    x = 13,912,644,484.53/123,835.80
  6. Step 6: Final answer
    x = 112,347.52

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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.