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Finding the Fourth Proportional to 66,915, 92,342.70 and 37,107

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Solution

The fourth proportional to 66,915, 92,342.70 and 37,107 is: 51,207.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,915 : 92,342.70 = 37,107 : x
  2. Step 2: Convert to fraction form
    66,915/92,342.70 = 37,107/x
  3. Step 3: Cross multiply
    66,915x = 92,342.70 × 37,107
  4. Step 4: Simplify right side
    66,915x = 3,426,560,568.90
  5. Step 5: Solve for x
    x = 3,426,560,568.90/66,915
  6. Step 6: Final answer
    x = 51,207.66

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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.