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Finding the Fourth Proportional to 99,178.64, 136,866.02 and 53,856.21

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Solution

The fourth proportional to 99,178.64, 136,866.02 and 53,856.21 is: 74,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,178.64 : 136,866.02 = 53,856.21 : x
  2. Step 2: Convert to fraction form
    99,178.64/136,866.02 = 53,856.21/x
  3. Step 3: Cross multiply
    99,178.64x = 136,866.02 × 53,856.21
  4. Step 4: Simplify right side
    99,178.64x = 7,371,084,845.70
  5. Step 5: Solve for x
    x = 7,371,084,845.70/99,178.64
  6. Step 6: Final answer
    x = 74,321.30

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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.