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Finding the Fourth Proportional to 90,992.70, 136,424.43 and 34,785.45

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Solution

The fourth proportional to 90,992.70, 136,424.43 and 34,785.45 is: 52,153.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,992.70 : 136,424.43 = 34,785.45 : x
  2. Step 2: Convert to fraction form
    90,992.70/136,424.43 = 34,785.45/x
  3. Step 3: Cross multiply
    90,992.70x = 136,424.43 × 34,785.45
  4. Step 4: Simplify right side
    90,992.70x = 4,745,585,188.54
  5. Step 5: Solve for x
    x = 4,745,585,188.54/90,992.70
  6. Step 6: Final answer
    x = 52,153.47

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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.