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Finding the Fourth Proportional to 90,003.80, 134,811.30 and 74,451.80

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Solution

The fourth proportional to 90,003.80, 134,811.30 and 74,451.80 is: 111,516.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,003.80 : 134,811.30 = 74,451.80 : x
  2. Step 2: Convert to fraction form
    90,003.80/134,811.30 = 74,451.80/x
  3. Step 3: Cross multiply
    90,003.80x = 134,811.30 × 74,451.80
  4. Step 4: Simplify right side
    90,003.80x = 10,036,943,945.34
  5. Step 5: Solve for x
    x = 10,036,943,945.34/90,003.80
  6. Step 6: Final answer
    x = 111,516.89

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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.