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Finding the Fourth Proportional to 90,069.65, 135,189.11 and 45,728.22

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Solution

The fourth proportional to 90,069.65, 135,189.11 and 45,728.22 is: 68,635.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,069.65 : 135,189.11 = 45,728.22 : x
  2. Step 2: Convert to fraction form
    90,069.65/135,189.11 = 45,728.22/x
  3. Step 3: Cross multiply
    90,069.65x = 135,189.11 × 45,728.22
  4. Step 4: Simplify right side
    90,069.65x = 6,181,957,478.00
  5. Step 5: Solve for x
    x = 6,181,957,478.00/90,069.65
  6. Step 6: Final answer
    x = 68,635.30

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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.