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Finding the Fourth Proportional to 73,124.50, 109,687.36 and 17,720.50

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Solution

The fourth proportional to 73,124.50, 109,687.36 and 17,720.50 is: 26,580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,124.50 : 109,687.36 = 17,720.50 : x
  2. Step 2: Convert to fraction form
    73,124.50/109,687.36 = 17,720.50/x
  3. Step 3: Cross multiply
    73,124.50x = 109,687.36 × 17,720.50
  4. Step 4: Simplify right side
    73,124.50x = 1,943,714,862.88
  5. Step 5: Solve for x
    x = 1,943,714,862.88/73,124.50
  6. Step 6: Final answer
    x = 26,580.90

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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.