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Finding the Fourth Proportional to 90,762.44, 136,042.77 and 68,503.64

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Solution

The fourth proportional to 90,762.44, 136,042.77 and 68,503.64 is: 102,679.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,762.44 : 136,042.77 = 68,503.64 : x
  2. Step 2: Convert to fraction form
    90,762.44/136,042.77 = 68,503.64/x
  3. Step 3: Cross multiply
    90,762.44x = 136,042.77 × 68,503.64
  4. Step 4: Simplify right side
    90,762.44x = 9,319,424,940.68
  5. Step 5: Solve for x
    x = 9,319,424,940.68/90,762.44
  6. Step 6: Final answer
    x = 102,679.31

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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.