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Finding the Fourth Proportional to 66,903.08, 100,363.80 and 38,836.31

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Solution

The fourth proportional to 66,903.08, 100,363.80 and 38,836.31 is: 58,259.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,903.08 : 100,363.80 = 38,836.31 : x
  2. Step 2: Convert to fraction form
    66,903.08/100,363.80 = 38,836.31/x
  3. Step 3: Cross multiply
    66,903.08x = 100,363.80 × 38,836.31
  4. Step 4: Simplify right side
    66,903.08x = 3,897,759,649.58
  5. Step 5: Solve for x
    x = 3,897,759,649.58/66,903.08
  6. Step 6: Final answer
    x = 58,259.79

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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.