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Finding the Fourth Proportional to 132,353.60, 198,530.40 and 90,363.20

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Solution

The fourth proportional to 132,353.60, 198,530.40 and 90,363.20 is: 135,544.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,353.60 : 198,530.40 = 90,363.20 : x
  2. Step 2: Convert to fraction form
    132,353.60/198,530.40 = 90,363.20/x
  3. Step 3: Cross multiply
    132,353.60x = 198,530.40 × 90,363.20
  4. Step 4: Simplify right side
    132,353.60x = 17,939,842,241.28
  5. Step 5: Solve for x
    x = 17,939,842,241.28/132,353.60
  6. Step 6: Final answer
    x = 135,544.80

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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.