Home / 138,140.91-190,632.56-77,711.54

Finding the Fourth Proportional to 138,140.91, 190,632.56 and 77,711.54

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Solution

The fourth proportional to 138,140.91, 190,632.56 and 77,711.54 is: 107,240.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,140.91 : 190,632.56 = 77,711.54 : x
  2. Step 2: Convert to fraction form
    138,140.91/190,632.56 = 77,711.54/x
  3. Step 3: Cross multiply
    138,140.91x = 190,632.56 × 77,711.54
  4. Step 4: Simplify right side
    138,140.91x = 14,814,348,470.02
  5. Step 5: Solve for x
    x = 14,814,348,470.02/138,140.91
  6. Step 6: Final answer
    x = 107,240.85

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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.