Home / 138,107.34-190,593.81-77,680.80

Finding the Fourth Proportional to 138,107.34, 190,593.81 and 77,680.80

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Solution

The fourth proportional to 138,107.34, 190,593.81 and 77,680.80 is: 107,202.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,107.34 : 190,593.81 = 77,680.80 : x
  2. Step 2: Convert to fraction form
    138,107.34/190,593.81 = 77,680.80/x
  3. Step 3: Cross multiply
    138,107.34x = 190,593.81 × 77,680.80
  4. Step 4: Simplify right side
    138,107.34x = 14,805,479,635.85
  5. Step 5: Solve for x
    x = 14,805,479,635.85/138,107.34
  6. Step 6: Final answer
    x = 107,202.70

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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.