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Finding the Fourth Proportional to 66,486.96, 91,742.93 and 38,192.66

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Solution

The fourth proportional to 66,486.96, 91,742.93 and 38,192.66 is: 52,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.96 : 91,742.93 = 38,192.66 : x
  2. Step 2: Convert to fraction form
    66,486.96/91,742.93 = 38,192.66/x
  3. Step 3: Cross multiply
    66,486.96x = 91,742.93 × 38,192.66
  4. Step 4: Simplify right side
    66,486.96x = 3,503,905,883.22
  5. Step 5: Solve for x
    x = 3,503,905,883.22/66,486.96
  6. Step 6: Final answer
    x = 52,700.65

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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.