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Finding the Fourth Proportional to 97,999.20, 146,847.60 and 72,921.60

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Solution

The fourth proportional to 97,999.20, 146,847.60 and 72,921.60 is: 109,269.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,999.20 : 146,847.60 = 72,921.60 : x
  2. Step 2: Convert to fraction form
    97,999.20/146,847.60 = 72,921.60/x
  3. Step 3: Cross multiply
    97,999.20x = 146,847.60 × 72,921.60
  4. Step 4: Simplify right side
    97,999.20x = 10,708,361,948.16
  5. Step 5: Solve for x
    x = 10,708,361,948.16/97,999.20
  6. Step 6: Final answer
    x = 109,269.89

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1.5x scale

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.