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Finding the Fourth Proportional to 52,697.52, 78,976.10 and 19,386.78

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Solution

The fourth proportional to 52,697.52, 78,976.10 and 19,386.78 is: 29,054.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,697.52 : 78,976.10 = 19,386.78 : x
  2. Step 2: Convert to fraction form
    52,697.52/78,976.10 = 19,386.78/x
  3. Step 3: Cross multiply
    52,697.52x = 78,976.10 × 19,386.78
  4. Step 4: Simplify right side
    52,697.52x = 1,531,091,919.21
  5. Step 5: Solve for x
    x = 1,531,091,919.21/52,697.52
  6. Step 6: Final answer
    x = 29,054.34

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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.