Home / 123,335.76-170,087.82-81,869.40

Finding the Fourth Proportional to 123,335.76, 170,087.82 and 81,869.40

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Solution

The fourth proportional to 123,335.76, 170,087.82 and 81,869.40 is: 112,903.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,335.76 : 170,087.82 = 81,869.40 : x
  2. Step 2: Convert to fraction form
    123,335.76/170,087.82 = 81,869.40/x
  3. Step 3: Cross multiply
    123,335.76x = 170,087.82 × 81,869.40
  4. Step 4: Simplify right side
    123,335.76x = 13,924,987,770.71
  5. Step 5: Solve for x
    x = 13,924,987,770.71/123,335.76
  6. Step 6: Final answer
    x = 112,903.08

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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.