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Finding the Fourth Proportional to 66,566.86, 91,874.12 and 39,341.82

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Solution

The fourth proportional to 66,566.86, 91,874.12 and 39,341.82 is: 54,298.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,566.86 : 91,874.12 = 39,341.82 : x
  2. Step 2: Convert to fraction form
    66,566.86/91,874.12 = 39,341.82/x
  3. Step 3: Cross multiply
    66,566.86x = 91,874.12 × 39,341.82
  4. Step 4: Simplify right side
    66,566.86x = 3,614,495,091.70
  5. Step 5: Solve for x
    x = 3,614,495,091.70/66,566.86
  6. Step 6: Final answer
    x = 54,298.72

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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.