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Finding the Fourth Proportional to 72,505.68, 100,102.64 and 48,340.64

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Solution

The fourth proportional to 72,505.68, 100,102.64 and 48,340.64 is: 66,739.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,505.68 : 100,102.64 = 48,340.64 : x
  2. Step 2: Convert to fraction form
    72,505.68/100,102.64 = 48,340.64/x
  3. Step 3: Cross multiply
    72,505.68x = 100,102.64 × 48,340.64
  4. Step 4: Simplify right side
    72,505.68x = 4,839,025,683.29
  5. Step 5: Solve for x
    x = 4,839,025,683.29/72,505.68
  6. Step 6: Final answer
    x = 66,739.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.