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Finding the Fourth Proportional to 67,781.68, 93,516.30 and 40,913.98

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Solution

The fourth proportional to 67,781.68, 93,516.30 and 40,913.98 is: 56,447.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,781.68 : 93,516.30 = 40,913.98 : x
  2. Step 2: Convert to fraction form
    67,781.68/93,516.30 = 40,913.98/x
  3. Step 3: Cross multiply
    67,781.68x = 93,516.30 × 40,913.98
  4. Step 4: Simplify right side
    67,781.68x = 3,826,124,027.87
  5. Step 5: Solve for x
    x = 3,826,124,027.87/67,781.68
  6. Step 6: Final answer
    x = 56,447.76

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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.