Home / 138,440.39-191,047.82-74,778.19

Finding the Fourth Proportional to 138,440.39, 191,047.82 and 74,778.19

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Solution

The fourth proportional to 138,440.39, 191,047.82 and 74,778.19 is: 103,193.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,440.39 : 191,047.82 = 74,778.19 : x
  2. Step 2: Convert to fraction form
    138,440.39/191,047.82 = 74,778.19/x
  3. Step 3: Cross multiply
    138,440.39x = 191,047.82 × 74,778.19
  4. Step 4: Simplify right side
    138,440.39x = 14,286,209,331.54
  5. Step 5: Solve for x
    x = 14,286,209,331.54/138,440.39
  6. Step 6: Final answer
    x = 103,193.94

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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.