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Finding the Fourth Proportional to 85,580.78, 118,061.71 and 55,375.84

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Solution

The fourth proportional to 85,580.78, 118,061.71 and 55,375.84 is: 76,392.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,580.78 : 118,061.71 = 55,375.84 : x
  2. Step 2: Convert to fraction form
    85,580.78/118,061.71 = 55,375.84/x
  3. Step 3: Cross multiply
    85,580.78x = 118,061.71 × 55,375.84
  4. Step 4: Simplify right side
    85,580.78x = 6,537,766,860.02
  5. Step 5: Solve for x
    x = 6,537,766,860.02/85,580.78
  6. Step 6: Final answer
    x = 76,392.93

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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.