Home / 138,051.72-207,078.30-38,212.20

Finding the Fourth Proportional to 138,051.72, 207,078.30 and 38,212.20

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Solution

The fourth proportional to 138,051.72, 207,078.30 and 38,212.20 is: 57,318.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,051.72 : 207,078.30 = 38,212.20 : x
  2. Step 2: Convert to fraction form
    138,051.72/207,078.30 = 38,212.20/x
  3. Step 3: Cross multiply
    138,051.72x = 207,078.30 × 38,212.20
  4. Step 4: Simplify right side
    138,051.72x = 7,912,917,415.26
  5. Step 5: Solve for x
    x = 7,912,917,415.26/138,051.72
  6. Step 6: Final answer
    x = 57,318.50

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1.5x scale

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.