Home / 138,154.05-207,222.63-81,259.42

Finding the Fourth Proportional to 138,154.05, 207,222.63 and 81,259.42

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Solution

The fourth proportional to 138,154.05, 207,222.63 and 81,259.42 is: 121,884.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154.05 : 207,222.63 = 81,259.42 : x
  2. Step 2: Convert to fraction form
    138,154.05/207,222.63 = 81,259.42/x
  3. Step 3: Cross multiply
    138,154.05x = 207,222.63 × 81,259.42
  4. Step 4: Simplify right side
    138,154.05x = 16,838,790,724.67
  5. Step 5: Solve for x
    x = 16,838,790,724.67/138,154.05
  6. Step 6: Final answer
    x = 121,884.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.