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Finding the Fourth Proportional to 90,409.69, 135,647.07 and 31,251.34

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Solution

The fourth proportional to 90,409.69, 135,647.07 and 31,251.34 is: 46,888.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,409.69 : 135,647.07 = 31,251.34 : x
  2. Step 2: Convert to fraction form
    90,409.69/135,647.07 = 31,251.34/x
  3. Step 3: Cross multiply
    90,409.69x = 135,647.07 × 31,251.34
  4. Step 4: Simplify right side
    90,409.69x = 4,239,152,704.57
  5. Step 5: Solve for x
    x = 4,239,152,704.57/90,409.69
  6. Step 6: Final answer
    x = 46,888.26

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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.