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Finding the Fourth Proportional to 68,676.60, 103,079.70 and 42,432.60

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Solution

The fourth proportional to 68,676.60, 103,079.70 and 42,432.60 is: 63,688.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,676.60 : 103,079.70 = 42,432.60 : x
  2. Step 2: Convert to fraction form
    68,676.60/103,079.70 = 42,432.60/x
  3. Step 3: Cross multiply
    68,676.60x = 103,079.70 × 42,432.60
  4. Step 4: Simplify right side
    68,676.60x = 4,373,939,678.22
  5. Step 5: Solve for x
    x = 4,373,939,678.22/68,676.60
  6. Step 6: Final answer
    x = 63,688.94

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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.