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Finding the Fourth Proportional to 59,438.40, 89,128.80 and 33,115.20

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Solution

The fourth proportional to 59,438.40, 89,128.80 and 33,115.20 is: 49,656.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,438.40 : 89,128.80 = 33,115.20 : x
  2. Step 2: Convert to fraction form
    59,438.40/89,128.80 = 33,115.20/x
  3. Step 3: Cross multiply
    59,438.40x = 89,128.80 × 33,115.20
  4. Step 4: Simplify right side
    59,438.40x = 2,951,518,037.76
  5. Step 5: Solve for x
    x = 2,951,518,037.76/59,438.40
  6. Step 6: Final answer
    x = 49,656.75

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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.