Home / 138,824.74-191,566.56-81,458.20

Finding the Fourth Proportional to 138,824.74, 191,566.56 and 81,458.20

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Solution

The fourth proportional to 138,824.74, 191,566.56 and 81,458.20 is: 112,405.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,824.74 : 191,566.56 = 81,458.20 : x
  2. Step 2: Convert to fraction form
    138,824.74/191,566.56 = 81,458.20/x
  3. Step 3: Cross multiply
    138,824.74x = 191,566.56 × 81,458.20
  4. Step 4: Simplify right side
    138,824.74x = 15,604,667,157.79
  5. Step 5: Solve for x
    x = 15,604,667,157.79/138,824.74
  6. Step 6: Final answer
    x = 112,405.52

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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.