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Finding the Fourth Proportional to 68,751.48, 103,055.16 and 28,793.28

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Solution

The fourth proportional to 68,751.48, 103,055.16 and 28,793.28 is: 43,159.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,751.48 : 103,055.16 = 28,793.28 : x
  2. Step 2: Convert to fraction form
    68,751.48/103,055.16 = 28,793.28/x
  3. Step 3: Cross multiply
    68,751.48x = 103,055.16 × 28,793.28
  4. Step 4: Simplify right side
    68,751.48x = 2,967,296,077.32
  5. Step 5: Solve for x
    x = 2,967,296,077.32/68,751.48
  6. Step 6: Final answer
    x = 43,159.74

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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.