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Finding the Fourth Proportional to 66,354.91, 91,568.40 and 36,140.77

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Solution

The fourth proportional to 66,354.91, 91,568.40 and 36,140.77 is: 49,873.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,354.91 : 91,568.40 = 36,140.77 : x
  2. Step 2: Convert to fraction form
    66,354.91/91,568.40 = 36,140.77/x
  3. Step 3: Cross multiply
    66,354.91x = 91,568.40 × 36,140.77
  4. Step 4: Simplify right side
    66,354.91x = 3,309,352,483.67
  5. Step 5: Solve for x
    x = 3,309,352,483.67/66,354.91
  6. Step 6: Final answer
    x = 49,873.51

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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.