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Finding the Fourth Proportional to 99,381.93, 137,191.85 and 65,408.25

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Solution

The fourth proportional to 99,381.93, 137,191.85 and 65,408.25 is: 90,292.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,381.93 : 137,191.85 = 65,408.25 : x
  2. Step 2: Convert to fraction form
    99,381.93/137,191.85 = 65,408.25/x
  3. Step 3: Cross multiply
    99,381.93x = 137,191.85 × 65,408.25
  4. Step 4: Simplify right side
    99,381.93x = 8,973,478,495.72
  5. Step 5: Solve for x
    x = 8,973,478,495.72/99,381.93
  6. Step 6: Final answer
    x = 90,292.86

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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.