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Finding the Fourth Proportional to 78,343.70, 117,515.55 and 62,791.70

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Solution

The fourth proportional to 78,343.70, 117,515.55 and 62,791.70 is: 94,187.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,343.70 : 117,515.55 = 62,791.70 : x
  2. Step 2: Convert to fraction form
    78,343.70/117,515.55 = 62,791.70/x
  3. Step 3: Cross multiply
    78,343.70x = 117,515.55 × 62,791.70
  4. Step 4: Simplify right side
    78,343.70x = 7,379,001,160.94
  5. Step 5: Solve for x
    x = 7,379,001,160.94/78,343.70
  6. Step 6: Final answer
    x = 94,187.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.