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Finding the Fourth Proportional to 90,969.92, 136,304.02 and 55,323.41

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Solution

The fourth proportional to 90,969.92, 136,304.02 and 55,323.41 is: 82,893.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,969.92 : 136,304.02 = 55,323.41 : x
  2. Step 2: Convert to fraction form
    90,969.92/136,304.02 = 55,323.41/x
  3. Step 3: Cross multiply
    90,969.92x = 136,304.02 × 55,323.41
  4. Step 4: Simplify right side
    90,969.92x = 7,540,803,385.56
  5. Step 5: Solve for x
    x = 7,540,803,385.56/90,969.92
  6. Step 6: Final answer
    x = 82,893.38

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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.