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Finding the Fourth Proportional to 98,919.60, 148,379.40 and 28,801.20

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Solution

The fourth proportional to 98,919.60, 148,379.40 and 28,801.20 is: 43,201.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,919.60 : 148,379.40 = 28,801.20 : x
  2. Step 2: Convert to fraction form
    98,919.60/148,379.40 = 28,801.20/x
  3. Step 3: Cross multiply
    98,919.60x = 148,379.40 × 28,801.20
  4. Step 4: Simplify right side
    98,919.60x = 4,273,504,775.28
  5. Step 5: Solve for x
    x = 4,273,504,775.28/98,919.60
  6. Step 6: Final answer
    x = 43,201.80

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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.