Home / 138,936.80-191,732.40-75,274.72

Finding the Fourth Proportional to 138,936.80, 191,732.40 and 75,274.72

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Solution

The fourth proportional to 138,936.80, 191,732.40 and 75,274.72 is: 103,878.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,936.80 : 191,732.40 = 75,274.72 : x
  2. Step 2: Convert to fraction form
    138,936.80/191,732.40 = 75,274.72/x
  3. Step 3: Cross multiply
    138,936.80x = 191,732.40 × 75,274.72
  4. Step 4: Simplify right side
    138,936.80x = 14,432,602,724.93
  5. Step 5: Solve for x
    x = 14,432,602,724.93/138,936.80
  6. Step 6: Final answer
    x = 103,878.91

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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.