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Finding the Fourth Proportional to 73,307.76, 109,961.64 and 20,712.84

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Solution

The fourth proportional to 73,307.76, 109,961.64 and 20,712.84 is: 31,069.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,307.76 : 109,961.64 = 20,712.84 : x
  2. Step 2: Convert to fraction form
    73,307.76/109,961.64 = 20,712.84/x
  3. Step 3: Cross multiply
    73,307.76x = 109,961.64 × 20,712.84
  4. Step 4: Simplify right side
    73,307.76x = 2,277,617,855.46
  5. Step 5: Solve for x
    x = 2,277,617,855.46/73,307.76
  6. Step 6: Final answer
    x = 31,069.26

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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.