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Finding the Fourth Proportional to 73,124, 109,686.60 and 17,720

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Solution

The fourth proportional to 73,124, 109,686.60 and 17,720 is: 26,580.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,124 : 109,686.60 = 17,720 : x
  2. Step 2: Convert to fraction form
    73,124/109,686.60 = 17,720/x
  3. Step 3: Cross multiply
    73,124x = 109,686.60 × 17,720
  4. Step 4: Simplify right side
    73,124x = 1,943,646,552
  5. Step 5: Solve for x
    x = 1,943,646,552/73,124
  6. Step 6: Final answer
    x = 26,580.15

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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.