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Finding the Fourth Proportional to 113,598.40, 170,397.60 and 80,420.80

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Solution

The fourth proportional to 113,598.40, 170,397.60 and 80,420.80 is: 120,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,598.40 : 170,397.60 = 80,420.80 : x
  2. Step 2: Convert to fraction form
    113,598.40/170,397.60 = 80,420.80/x
  3. Step 3: Cross multiply
    113,598.40x = 170,397.60 × 80,420.80
  4. Step 4: Simplify right side
    113,598.40x = 13,703,511,310.08
  5. Step 5: Solve for x
    x = 13,703,511,310.08/113,598.40
  6. Step 6: Final answer
    x = 120,631.20

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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.