Home / 138,679.06-191,376.21-75,015.49

Finding the Fourth Proportional to 138,679.06, 191,376.21 and 75,015.49

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Solution

The fourth proportional to 138,679.06, 191,376.21 and 75,015.49 is: 103,520.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,679.06 : 191,376.21 = 75,015.49 : x
  2. Step 2: Convert to fraction form
    138,679.06/191,376.21 = 75,015.49/x
  3. Step 3: Cross multiply
    138,679.06x = 191,376.21 × 75,015.49
  4. Step 4: Simplify right side
    138,679.06x = 14,356,180,167.49
  5. Step 5: Solve for x
    x = 14,356,180,167.49/138,679.06
  6. Step 6: Final answer
    x = 103,520.89

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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.