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Finding the Fourth Proportional to 73,108.30, 109,662.45 and 72,417.10

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Solution

The fourth proportional to 73,108.30, 109,662.45 and 72,417.10 is: 108,625.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,108.30 : 109,662.45 = 72,417.10 : x
  2. Step 2: Convert to fraction form
    73,108.30/109,662.45 = 72,417.10/x
  3. Step 3: Cross multiply
    73,108.30x = 109,662.45 × 72,417.10
  4. Step 4: Simplify right side
    73,108.30x = 7,941,436,607.90
  5. Step 5: Solve for x
    x = 7,941,436,607.90/73,108.30
  6. Step 6: Final answer
    x = 108,625.65

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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.