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Finding the Fourth Proportional to 66,733.31, 92,082.86 and 39,870.11

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Solution

The fourth proportional to 66,733.31, 92,082.86 and 39,870.11 is: 55,015.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,733.31 : 92,082.86 = 39,870.11 : x
  2. Step 2: Convert to fraction form
    66,733.31/92,082.86 = 39,870.11/x
  3. Step 3: Cross multiply
    66,733.31x = 92,082.86 × 39,870.11
  4. Step 4: Simplify right side
    66,733.31x = 3,671,353,757.31
  5. Step 5: Solve for x
    x = 3,671,353,757.31/66,733.31
  6. Step 6: Final answer
    x = 55,015.31

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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.