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Finding the Fourth Proportional to 73,137.50, 109,710 and 20,551.08

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Solution

The fourth proportional to 73,137.50, 109,710 and 20,551.08 is: 30,827.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,137.50 : 109,710 = 20,551.08 : x
  2. Step 2: Convert to fraction form
    73,137.50/109,710 = 20,551.08/x
  3. Step 3: Cross multiply
    73,137.50x = 109,710 × 20,551.08
  4. Step 4: Simplify right side
    73,137.50x = 2,254,658,986.80
  5. Step 5: Solve for x
    x = 2,254,658,986.80/73,137.50
  6. Step 6: Final answer
    x = 30,827.68

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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.