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Finding the Fourth Proportional to 43,682.80, 65,621.40 and 42,516.40

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Solution

The fourth proportional to 43,682.80, 65,621.40 and 42,516.40 is: 63,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,682.80 : 65,621.40 = 42,516.40 : x
  2. Step 2: Convert to fraction form
    43,682.80/65,621.40 = 42,516.40/x
  3. Step 3: Cross multiply
    43,682.80x = 65,621.40 × 42,516.40
  4. Step 4: Simplify right side
    43,682.80x = 2,789,985,690.96
  5. Step 5: Solve for x
    x = 2,789,985,690.96/43,682.80
  6. Step 6: Final answer
    x = 63,869.20

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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.