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Finding the Fourth Proportional to 218,806.56, 328,228.20 and 61,036.92

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Solution

The fourth proportional to 218,806.56, 328,228.20 and 61,036.92 is: 91,560.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,806.56 : 328,228.20 = 61,036.92 : x
  2. Step 2: Convert to fraction form
    218,806.56/328,228.20 = 61,036.92/x
  3. Step 3: Cross multiply
    218,806.56x = 328,228.20 × 61,036.92
  4. Step 4: Simplify right side
    218,806.56x = 20,034,038,385.14
  5. Step 5: Solve for x
    x = 20,034,038,385.14/218,806.56
  6. Step 6: Final answer
    x = 91,560.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.