Home / 138,790.56-191,531.92-75,128.52

Finding the Fourth Proportional to 138,790.56, 191,531.92 and 75,128.52

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Solution

The fourth proportional to 138,790.56, 191,531.92 and 75,128.52 is: 103,677.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,790.56 : 191,531.92 = 75,128.52 : x
  2. Step 2: Convert to fraction form
    138,790.56/191,531.92 = 75,128.52/x
  3. Step 3: Cross multiply
    138,790.56x = 191,531.92 × 75,128.52
  4. Step 4: Simplify right side
    138,790.56x = 14,389,509,682.36
  5. Step 5: Solve for x
    x = 14,389,509,682.36/138,790.56
  6. Step 6: Final answer
    x = 103,677.87

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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.