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Finding the Fourth Proportional to 97,989.60, 147,157.20 and 75,856.80

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Solution

The fourth proportional to 97,989.60, 147,157.20 and 75,856.80 is: 113,918.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,989.60 : 147,157.20 = 75,856.80 : x
  2. Step 2: Convert to fraction form
    97,989.60/147,157.20 = 75,856.80/x
  3. Step 3: Cross multiply
    97,989.60x = 147,157.20 × 75,856.80
  4. Step 4: Simplify right side
    97,989.60x = 11,162,874,288.96
  5. Step 5: Solve for x
    x = 11,162,874,288.96/97,989.60
  6. Step 6: Final answer
    x = 113,918.97

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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.