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Finding the Fourth Proportional to 97,112.80, 145,323.60 and 67,391.20

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Solution

The fourth proportional to 97,112.80, 145,323.60 and 67,391.20 is: 100,846.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,112.80 : 145,323.60 = 67,391.20 : x
  2. Step 2: Convert to fraction form
    97,112.80/145,323.60 = 67,391.20/x
  3. Step 3: Cross multiply
    97,112.80x = 145,323.60 × 67,391.20
  4. Step 4: Simplify right side
    97,112.80x = 9,793,531,792.32
  5. Step 5: Solve for x
    x = 9,793,531,792.32/97,112.80
  6. Step 6: Final answer
    x = 100,846.97

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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.