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Finding the Fourth Proportional to 105,671.28, 145,873.26 and 67,480.86

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Solution

The fourth proportional to 105,671.28, 145,873.26 and 67,480.86 is: 93,153.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,671.28 : 145,873.26 = 67,480.86 : x
  2. Step 2: Convert to fraction form
    105,671.28/145,873.26 = 67,480.86/x
  3. Step 3: Cross multiply
    105,671.28x = 145,873.26 × 67,480.86
  4. Step 4: Simplify right side
    105,671.28x = 9,843,653,035.80
  5. Step 5: Solve for x
    x = 9,843,653,035.80/105,671.28
  6. Step 6: Final answer
    x = 93,153.53

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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.