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Finding the Fourth Proportional to 99,385.93, 137,197.38 and 65,412.25

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Solution

The fourth proportional to 99,385.93, 137,197.38 and 65,412.25 is: 90,298.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,385.93 : 137,197.38 = 65,412.25 : x
  2. Step 2: Convert to fraction form
    99,385.93/137,197.38 = 65,412.25/x
  3. Step 3: Cross multiply
    99,385.93x = 137,197.38 × 65,412.25
  4. Step 4: Simplify right side
    99,385.93x = 8,974,389,319.91
  5. Step 5: Solve for x
    x = 8,974,389,319.91/99,385.93
  6. Step 6: Final answer
    x = 90,298.39

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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.