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Finding the Fourth Proportional to 99,561.88, 148,991.88 and 62,139.48

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Solution

The fourth proportional to 99,561.88, 148,991.88 and 62,139.48 is: 92,990.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,561.88 : 148,991.88 = 62,139.48 : x
  2. Step 2: Convert to fraction form
    99,561.88/148,991.88 = 62,139.48/x
  3. Step 3: Cross multiply
    99,561.88x = 148,991.88 × 62,139.48
  4. Step 4: Simplify right side
    99,561.88x = 9,258,277,947.42
  5. Step 5: Solve for x
    x = 9,258,277,947.42/99,561.88
  6. Step 6: Final answer
    x = 92,990.19

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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.