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Finding the Fourth Proportional to 68,520.20, 102,780.30 and 64,718.60

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Solution

The fourth proportional to 68,520.20, 102,780.30 and 64,718.60 is: 97,077.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,520.20 : 102,780.30 = 64,718.60 : x
  2. Step 2: Convert to fraction form
    68,520.20/102,780.30 = 64,718.60/x
  3. Step 3: Cross multiply
    68,520.20x = 102,780.30 × 64,718.60
  4. Step 4: Simplify right side
    68,520.20x = 6,651,797,123.58
  5. Step 5: Solve for x
    x = 6,651,797,123.58/68,520.20
  6. Step 6: Final answer
    x = 97,077.90

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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.