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Finding the Fourth Proportional to 173,428.60, 260,142.90 and 90,311.80

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Solution

The fourth proportional to 173,428.60, 260,142.90 and 90,311.80 is: 135,467.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,428.60 : 260,142.90 = 90,311.80 : x
  2. Step 2: Convert to fraction form
    173,428.60/260,142.90 = 90,311.80/x
  3. Step 3: Cross multiply
    173,428.60x = 260,142.90 × 90,311.80
  4. Step 4: Simplify right side
    173,428.60x = 23,493,973,556.22
  5. Step 5: Solve for x
    x = 23,493,973,556.22/173,428.60
  6. Step 6: Final answer
    x = 135,467.70

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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.