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Finding the Fourth Proportional to 77,081.60, 115,708.80 and 59,628.80

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Solution

The fourth proportional to 77,081.60, 115,708.80 and 59,628.80 is: 89,510.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,081.60 : 115,708.80 = 59,628.80 : x
  2. Step 2: Convert to fraction form
    77,081.60/115,708.80 = 59,628.80/x
  3. Step 3: Cross multiply
    77,081.60x = 115,708.80 × 59,628.80
  4. Step 4: Simplify right side
    77,081.60x = 6,899,576,893.44
  5. Step 5: Solve for x
    x = 6,899,576,893.44/77,081.60
  6. Step 6: Final answer
    x = 89,510.04

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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.