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Finding the Fourth Proportional to 97,319.60, 145,979.40 and 80,730.80

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Solution

The fourth proportional to 97,319.60, 145,979.40 and 80,730.80 is: 121,096.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,319.60 : 145,979.40 = 80,730.80 : x
  2. Step 2: Convert to fraction form
    97,319.60/145,979.40 = 80,730.80/x
  3. Step 3: Cross multiply
    97,319.60x = 145,979.40 × 80,730.80
  4. Step 4: Simplify right side
    97,319.60x = 11,785,033,745.52
  5. Step 5: Solve for x
    x = 11,785,033,745.52/97,319.60
  6. Step 6: Final answer
    x = 121,096.20

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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.