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Finding the Fourth Proportional to 68,903.20, 103,093.40 and 40,838.32

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Solution

The fourth proportional to 68,903.20, 103,093.40 and 40,838.32 is: 61,102.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,903.20 : 103,093.40 = 40,838.32 : x
  2. Step 2: Convert to fraction form
    68,903.20/103,093.40 = 40,838.32/x
  3. Step 3: Cross multiply
    68,903.20x = 103,093.40 × 40,838.32
  4. Step 4: Simplify right side
    68,903.20x = 4,210,161,259.09
  5. Step 5: Solve for x
    x = 4,210,161,259.09/68,903.20
  6. Step 6: Final answer
    x = 61,102.55

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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.