Home / 81,977.40-113,134.32-61,798.68

Finding the Fourth Proportional to 81,977.40, 113,134.32 and 61,798.68

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Solution

The fourth proportional to 81,977.40, 113,134.32 and 61,798.68 is: 85,286.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,977.40 : 113,134.32 = 61,798.68 : x
  2. Step 2: Convert to fraction form
    81,977.40/113,134.32 = 61,798.68/x
  3. Step 3: Cross multiply
    81,977.40x = 113,134.32 × 61,798.68
  4. Step 4: Simplify right side
    81,977.40x = 6,991,551,638.70
  5. Step 5: Solve for x
    x = 6,991,551,638.70/81,977.40
  6. Step 6: Final answer
    x = 85,286.33

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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.