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Finding the Fourth Proportional to 78,861.64, 108,827.40 and 43,049.92

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Solution

The fourth proportional to 78,861.64, 108,827.40 and 43,049.92 is: 59,407.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,861.64 : 108,827.40 = 43,049.92 : x
  2. Step 2: Convert to fraction form
    78,861.64/108,827.40 = 43,049.92/x
  3. Step 3: Cross multiply
    78,861.64x = 108,827.40 × 43,049.92
  4. Step 4: Simplify right side
    78,861.64x = 4,685,010,863.81
  5. Step 5: Solve for x
    x = 4,685,010,863.81/78,861.64
  6. Step 6: Final answer
    x = 59,407.98

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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.