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Finding the Fourth Proportional to 66,978.75, 92,430.68 and 37,170.75

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Solution

The fourth proportional to 66,978.75, 92,430.68 and 37,170.75 is: 51,295.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978.75 : 92,430.68 = 37,170.75 : x
  2. Step 2: Convert to fraction form
    66,978.75/92,430.68 = 37,170.75/x
  3. Step 3: Cross multiply
    66,978.75x = 92,430.68 × 37,170.75
  4. Step 4: Simplify right side
    66,978.75x = 3,435,717,512.76
  5. Step 5: Solve for x
    x = 3,435,717,512.76/66,978.75
  6. Step 6: Final answer
    x = 51,295.64

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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.