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Finding the Fourth Proportional to 107,963.76, 149,008.20 and 79,751.28

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Solution

The fourth proportional to 107,963.76, 149,008.20 and 79,751.28 is: 110,070.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,963.76 : 149,008.20 = 79,751.28 : x
  2. Step 2: Convert to fraction form
    107,963.76/149,008.20 = 79,751.28/x
  3. Step 3: Cross multiply
    107,963.76x = 149,008.20 × 79,751.28
  4. Step 4: Simplify right side
    107,963.76x = 11,883,594,680.50
  5. Step 5: Solve for x
    x = 11,883,594,680.50/107,963.76
  6. Step 6: Final answer
    x = 110,070.22

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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.