Home / 77,015.20-106,211.90-64,137.11

Finding the Fourth Proportional to 77,015.20, 106,211.90 and 64,137.11

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Solution

The fourth proportional to 77,015.20, 106,211.90 and 64,137.11 is: 88,451.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,015.20 : 106,211.90 = 64,137.11 : x
  2. Step 2: Convert to fraction form
    77,015.20/106,211.90 = 64,137.11/x
  3. Step 3: Cross multiply
    77,015.20x = 106,211.90 × 64,137.11
  4. Step 4: Simplify right side
    77,015.20x = 6,812,123,860.16
  5. Step 5: Solve for x
    x = 6,812,123,860.16/77,015.20
  6. Step 6: Final answer
    x = 88,451.68

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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.