Home / 140,020.54-193,171.88-81,045.21

Finding the Fourth Proportional to 140,020.54, 193,171.88 and 81,045.21

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Solution

The fourth proportional to 140,020.54, 193,171.88 and 81,045.21 is: 111,809.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,020.54 : 193,171.88 = 81,045.21 : x
  2. Step 2: Convert to fraction form
    140,020.54/193,171.88 = 81,045.21/x
  3. Step 3: Cross multiply
    140,020.54x = 193,171.88 × 81,045.21
  4. Step 4: Simplify right side
    140,020.54x = 15,655,655,580.69
  5. Step 5: Solve for x
    x = 15,655,655,580.69/140,020.54
  6. Step 6: Final answer
    x = 111,809.71

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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.