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Finding the Fourth Proportional to 68,455.60, 102,748.20 and 42,211.60

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Solution

The fourth proportional to 68,455.60, 102,748.20 and 42,211.60 is: 63,357.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,455.60 : 102,748.20 = 42,211.60 : x
  2. Step 2: Convert to fraction form
    68,455.60/102,748.20 = 42,211.60/x
  3. Step 3: Cross multiply
    68,455.60x = 102,748.20 × 42,211.60
  4. Step 4: Simplify right side
    68,455.60x = 4,337,165,919.12
  5. Step 5: Solve for x
    x = 4,337,165,919.12/68,455.60
  6. Step 6: Final answer
    x = 63,357.36

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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.