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Finding the Fourth Proportional to 90,171.67, 135,280.57 and 52,763.20

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Solution

The fourth proportional to 90,171.67, 135,280.57 and 52,763.20 is: 79,158.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,171.67 : 135,280.57 = 52,763.20 : x
  2. Step 2: Convert to fraction form
    90,171.67/135,280.57 = 52,763.20/x
  3. Step 3: Cross multiply
    90,171.67x = 135,280.57 × 52,763.20
  4. Step 4: Simplify right side
    90,171.67x = 7,137,835,771.02
  5. Step 5: Solve for x
    x = 7,137,835,771.02/90,171.67
  6. Step 6: Final answer
    x = 79,158.30

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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.