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Finding the Fourth Proportional to 102,758.40, 154,137.60 and 67,276.80

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Solution

The fourth proportional to 102,758.40, 154,137.60 and 67,276.80 is: 100,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,758.40 : 154,137.60 = 67,276.80 : x
  2. Step 2: Convert to fraction form
    102,758.40/154,137.60 = 67,276.80/x
  3. Step 3: Cross multiply
    102,758.40x = 154,137.60 × 67,276.80
  4. Step 4: Simplify right side
    102,758.40x = 10,369,884,487.68
  5. Step 5: Solve for x
    x = 10,369,884,487.68/102,758.40
  6. Step 6: Final answer
    x = 100,915.20

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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.