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Finding the Fourth Proportional to 68,709.60, 103,113 and 40,612.32

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Solution

The fourth proportional to 68,709.60, 103,113 and 40,612.32 is: 60,947.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,709.60 : 103,113 = 40,612.32 : x
  2. Step 2: Convert to fraction form
    68,709.60/103,113 = 40,612.32/x
  3. Step 3: Cross multiply
    68,709.60x = 103,113 × 40,612.32
  4. Step 4: Simplify right side
    68,709.60x = 4,187,658,152.16
  5. Step 5: Solve for x
    x = 4,187,658,152.16/68,709.60
  6. Step 6: Final answer
    x = 60,947.21

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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.