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Finding the Fourth Proportional to 99,078.40, 148,617.60 and 65,617.30

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Solution

The fourth proportional to 99,078.40, 148,617.60 and 65,617.30 is: 98,425.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,078.40 : 148,617.60 = 65,617.30 : x
  2. Step 2: Convert to fraction form
    99,078.40/148,617.60 = 65,617.30/x
  3. Step 3: Cross multiply
    99,078.40x = 148,617.60 × 65,617.30
  4. Step 4: Simplify right side
    99,078.40x = 9,751,885,644.48
  5. Step 5: Solve for x
    x = 9,751,885,644.48/99,078.40
  6. Step 6: Final answer
    x = 98,425.95

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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.