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Finding the Fourth Proportional to 73,722.90, 110,573.55 and 21,126.90

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Solution

The fourth proportional to 73,722.90, 110,573.55 and 21,126.90 is: 31,687.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,722.90 : 110,573.55 = 21,126.90 : x
  2. Step 2: Convert to fraction form
    73,722.90/110,573.55 = 21,126.90/x
  3. Step 3: Cross multiply
    73,722.90x = 110,573.55 × 21,126.90
  4. Step 4: Simplify right side
    73,722.90x = 2,336,076,333.50
  5. Step 5: Solve for x
    x = 2,336,076,333.50/73,722.90
  6. Step 6: Final answer
    x = 31,687.26

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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.