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Finding the Fourth Proportional to 90,428.80, 135,589.92 and 37,104.88

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Solution

The fourth proportional to 90,428.80, 135,589.92 and 37,104.88 is: 55,635.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428.80 : 135,589.92 = 37,104.88 : x
  2. Step 2: Convert to fraction form
    90,428.80/135,589.92 = 37,104.88/x
  3. Step 3: Cross multiply
    90,428.80x = 135,589.92 × 37,104.88
  4. Step 4: Simplify right side
    90,428.80x = 5,031,047,710.81
  5. Step 5: Solve for x
    x = 5,031,047,710.81/90,428.80
  6. Step 6: Final answer
    x = 55,635.46

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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.