Home / 139,146.54-191,998.80-81,774.24

Finding the Fourth Proportional to 139,146.54, 191,998.80 and 81,774.24

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Solution

The fourth proportional to 139,146.54, 191,998.80 and 81,774.24 is: 112,834.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,146.54 : 191,998.80 = 81,774.24 : x
  2. Step 2: Convert to fraction form
    139,146.54/191,998.80 = 81,774.24/x
  3. Step 3: Cross multiply
    139,146.54x = 191,998.80 × 81,774.24
  4. Step 4: Simplify right side
    139,146.54x = 15,700,555,950.91
  5. Step 5: Solve for x
    x = 15,700,555,950.91/139,146.54
  6. Step 6: Final answer
    x = 112,834.68

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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.