Home / 137,972.20-190,408.44-77,539.72

Finding the Fourth Proportional to 137,972.20, 190,408.44 and 77,539.72

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Solution

The fourth proportional to 137,972.20, 190,408.44 and 77,539.72 is: 107,008.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,972.20 : 190,408.44 = 77,539.72 : x
  2. Step 2: Convert to fraction form
    137,972.20/190,408.44 = 77,539.72/x
  3. Step 3: Cross multiply
    137,972.20x = 190,408.44 × 77,539.72
  4. Step 4: Simplify right side
    137,972.20x = 14,764,217,123.24
  5. Step 5: Solve for x
    x = 14,764,217,123.24/137,972.20
  6. Step 6: Final answer
    x = 107,008.64

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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.