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Finding the Fourth Proportional to 66,761.04, 92,100.92 and 39,890.10

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Solution

The fourth proportional to 66,761.04, 92,100.92 and 39,890.10 is: 55,030.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,761.04 : 92,100.92 = 39,890.10 : x
  2. Step 2: Convert to fraction form
    66,761.04/92,100.92 = 39,890.10/x
  3. Step 3: Cross multiply
    66,761.04x = 92,100.92 × 39,890.10
  4. Step 4: Simplify right side
    66,761.04x = 3,673,914,908.89
  5. Step 5: Solve for x
    x = 3,673,914,908.89/66,761.04
  6. Step 6: Final answer
    x = 55,030.82

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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.