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Finding the Fourth Proportional to 66,493.66, 91,773.12 and 39,637.88

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Solution

The fourth proportional to 66,493.66, 91,773.12 and 39,637.88 is: 54,707.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,493.66 : 91,773.12 = 39,637.88 : x
  2. Step 2: Convert to fraction form
    66,493.66/91,773.12 = 39,637.88/x
  3. Step 3: Cross multiply
    66,493.66x = 91,773.12 × 39,637.88
  4. Step 4: Simplify right side
    66,493.66x = 3,637,691,917.79
  5. Step 5: Solve for x
    x = 3,637,691,917.79/66,493.66
  6. Step 6: Final answer
    x = 54,707.35

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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.