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Finding the Fourth Proportional to 81,226.68, 112,113.12 and 65,030.76

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Solution

The fourth proportional to 81,226.68, 112,113.12 and 65,030.76 is: 89,758.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,226.68 : 112,113.12 = 65,030.76 : x
  2. Step 2: Convert to fraction form
    81,226.68/112,113.12 = 65,030.76/x
  3. Step 3: Cross multiply
    81,226.68x = 112,113.12 × 65,030.76
  4. Step 4: Simplify right side
    81,226.68x = 7,290,801,399.57
  5. Step 5: Solve for x
    x = 7,290,801,399.57/81,226.68
  6. Step 6: Final answer
    x = 89,758.70

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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.