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Finding the Fourth Proportional to 68,417.20, 102,625.80 and 40,423.60

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Solution

The fourth proportional to 68,417.20, 102,625.80 and 40,423.60 is: 60,635.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,417.20 : 102,625.80 = 40,423.60 : x
  2. Step 2: Convert to fraction form
    68,417.20/102,625.80 = 40,423.60/x
  3. Step 3: Cross multiply
    68,417.20x = 102,625.80 × 40,423.60
  4. Step 4: Simplify right side
    68,417.20x = 4,148,504,288.88
  5. Step 5: Solve for x
    x = 4,148,504,288.88/68,417.20
  6. Step 6: Final answer
    x = 60,635.40

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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.