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Finding the Fourth Proportional to 103,122.45, 154,920.51 and 72,797.32

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Solution

The fourth proportional to 103,122.45, 154,920.51 and 72,797.32 is: 109,363.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,122.45 : 154,920.51 = 72,797.32 : x
  2. Step 2: Convert to fraction form
    103,122.45/154,920.51 = 72,797.32/x
  3. Step 3: Cross multiply
    103,122.45x = 154,920.51 × 72,797.32
  4. Step 4: Simplify right side
    103,122.45x = 11,277,797,941.03
  5. Step 5: Solve for x
    x = 11,277,797,941.03/103,122.45
  6. Step 6: Final answer
    x = 109,363.17

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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.