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Finding the Fourth Proportional to 74,766.28, 103,119.15 and 47,911.28

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Solution

The fourth proportional to 74,766.28, 103,119.15 and 47,911.28 is: 66,080.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,766.28 : 103,119.15 = 47,911.28 : x
  2. Step 2: Convert to fraction form
    74,766.28/103,119.15 = 47,911.28/x
  3. Step 3: Cross multiply
    74,766.28x = 103,119.15 × 47,911.28
  4. Step 4: Simplify right side
    74,766.28x = 4,940,570,726.81
  5. Step 5: Solve for x
    x = 4,940,570,726.81/74,766.28
  6. Step 6: Final answer
    x = 66,080.20

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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.