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Finding the Fourth Proportional to 86,805.52, 119,841.80 and 57,756.69

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Solution

The fourth proportional to 86,805.52, 119,841.80 and 57,756.69 is: 79,737.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,805.52 : 119,841.80 = 57,756.69 : x
  2. Step 2: Convert to fraction form
    86,805.52/119,841.80 = 57,756.69/x
  3. Step 3: Cross multiply
    86,805.52x = 119,841.80 × 57,756.69
  4. Step 4: Simplify right side
    86,805.52x = 6,921,665,836.03
  5. Step 5: Solve for x
    x = 6,921,665,836.03/86,805.52
  6. Step 6: Final answer
    x = 79,737.63

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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.