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Finding the Fourth Proportional to 61,983.20, 92,974.80 and 43,320.80

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Solution

The fourth proportional to 61,983.20, 92,974.80 and 43,320.80 is: 64,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,983.20 : 92,974.80 = 43,320.80 : x
  2. Step 2: Convert to fraction form
    61,983.20/92,974.80 = 43,320.80/x
  3. Step 3: Cross multiply
    61,983.20x = 92,974.80 × 43,320.80
  4. Step 4: Simplify right side
    61,983.20x = 4,027,742,715.84
  5. Step 5: Solve for x
    x = 4,027,742,715.84/61,983.20
  6. Step 6: Final answer
    x = 64,981.20

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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.