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Finding the Fourth Proportional to 68,793.70, 103,093.35 and 42,420.10

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Solution

The fourth proportional to 68,793.70, 103,093.35 and 42,420.10 is: 63,570.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,793.70 : 103,093.35 = 42,420.10 : x
  2. Step 2: Convert to fraction form
    68,793.70/103,093.35 = 42,420.10/x
  3. Step 3: Cross multiply
    68,793.70x = 103,093.35 × 42,420.10
  4. Step 4: Simplify right side
    68,793.70x = 4,373,230,216.34
  5. Step 5: Solve for x
    x = 4,373,230,216.34/68,793.70
  6. Step 6: Final answer
    x = 63,570.21

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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.