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Finding the Fourth Proportional to 98,865.81, 148,320.60 and 54,469.71

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Solution

The fourth proportional to 98,865.81, 148,320.60 and 54,469.71 is: 81,716.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,865.81 : 148,320.60 = 54,469.71 : x
  2. Step 2: Convert to fraction form
    98,865.81/148,320.60 = 54,469.71/x
  3. Step 3: Cross multiply
    98,865.81x = 148,320.60 × 54,469.71
  4. Step 4: Simplify right side
    98,865.81x = 8,078,980,069.03
  5. Step 5: Solve for x
    x = 8,078,980,069.03/98,865.81
  6. Step 6: Final answer
    x = 81,716.62

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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.