Home / 138,972.45-208,737.60-82,921.93

Finding the Fourth Proportional to 138,972.45, 208,737.60 and 82,921.93

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Solution

The fourth proportional to 138,972.45, 208,737.60 and 82,921.93 is: 124,549.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,972.45 : 208,737.60 = 82,921.93 : x
  2. Step 2: Convert to fraction form
    138,972.45/208,737.60 = 82,921.93/x
  3. Step 3: Cross multiply
    138,972.45x = 208,737.60 × 82,921.93
  4. Step 4: Simplify right side
    138,972.45x = 17,308,924,655.57
  5. Step 5: Solve for x
    x = 17,308,924,655.57/138,972.45
  6. Step 6: Final answer
    x = 124,549.32

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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.