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Finding the Fourth Proportional to 243,778.16, 365,601.72 and 85,985.84

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Solution

The fourth proportional to 243,778.16, 365,601.72 and 85,985.84 is: 128,955.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,778.16 : 365,601.72 = 85,985.84 : x
  2. Step 2: Convert to fraction form
    243,778.16/365,601.72 = 85,985.84/x
  3. Step 3: Cross multiply
    243,778.16x = 365,601.72 × 85,985.84
  4. Step 4: Simplify right side
    243,778.16x = 31,436,570,999.64
  5. Step 5: Solve for x
    x = 31,436,570,999.64/243,778.16
  6. Step 6: Final answer
    x = 128,955.65

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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.