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Finding the Fourth Proportional to 99,216.52, 136,954.74 and 65,693.32

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Solution

The fourth proportional to 99,216.52, 136,954.74 and 65,693.32 is: 90,680.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,216.52 : 136,954.74 = 65,693.32 : x
  2. Step 2: Convert to fraction form
    99,216.52/136,954.74 = 65,693.32/x
  3. Step 3: Cross multiply
    99,216.52x = 136,954.74 × 65,693.32
  4. Step 4: Simplify right side
    99,216.52x = 8,997,011,560.34
  5. Step 5: Solve for x
    x = 8,997,011,560.34/99,216.52
  6. Step 6: Final answer
    x = 90,680.58

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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.