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Finding the Fourth Proportional to 65,652.72, 90,474.35 and 47,719.32

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Solution

The fourth proportional to 65,652.72, 90,474.35 and 47,719.32 is: 65,760.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,652.72 : 90,474.35 = 47,719.32 : x
  2. Step 2: Convert to fraction form
    65,652.72/90,474.35 = 47,719.32/x
  3. Step 3: Cross multiply
    65,652.72x = 90,474.35 × 47,719.32
  4. Step 4: Simplify right side
    65,652.72x = 4,317,374,220.85
  5. Step 5: Solve for x
    x = 4,317,374,220.85/65,652.72
  6. Step 6: Final answer
    x = 65,760.78

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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.