Home / 138,440.75-191,048.32-74,778.55

Finding the Fourth Proportional to 138,440.75, 191,048.32 and 74,778.55

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Solution

The fourth proportional to 138,440.75, 191,048.32 and 74,778.55 is: 103,194.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,440.75 : 191,048.32 = 74,778.55 : x
  2. Step 2: Convert to fraction form
    138,440.75/191,048.32 = 74,778.55/x
  3. Step 3: Cross multiply
    138,440.75x = 191,048.32 × 74,778.55
  4. Step 4: Simplify right side
    138,440.75x = 14,286,315,684.97
  5. Step 5: Solve for x
    x = 14,286,315,684.97/138,440.75
  6. Step 6: Final answer
    x = 103,194.44

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1.5x scale

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.