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Finding the Fourth Proportional to 90,489.50, 124,890.50 and 50,216.20

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Solution

The fourth proportional to 90,489.50, 124,890.50 and 50,216.20 is: 69,306.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,489.50 : 124,890.50 = 50,216.20 : x
  2. Step 2: Convert to fraction form
    90,489.50/124,890.50 = 50,216.20/x
  3. Step 3: Cross multiply
    90,489.50x = 124,890.50 × 50,216.20
  4. Step 4: Simplify right side
    90,489.50x = 6,271,526,326.10
  5. Step 5: Solve for x
    x = 6,271,526,326.10/90,489.50
  6. Step 6: Final answer
    x = 69,306.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.