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Finding the Fourth Proportional to 66,978.01, 92,430.71 and 36,766.09

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Solution

The fourth proportional to 66,978.01, 92,430.71 and 36,766.09 is: 50,737.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978.01 : 92,430.71 = 36,766.09 : x
  2. Step 2: Convert to fraction form
    66,978.01/92,430.71 = 36,766.09/x
  3. Step 3: Cross multiply
    66,978.01x = 92,430.71 × 36,766.09
  4. Step 4: Simplify right side
    66,978.01x = 3,398,315,690.52
  5. Step 5: Solve for x
    x = 3,398,315,690.52/66,978.01
  6. Step 6: Final answer
    x = 50,737.78

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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.