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Finding the Fourth Proportional to 198,215.40, 297,368.48 and 85,914.40

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Solution

The fourth proportional to 198,215.40, 297,368.48 and 85,914.40 is: 128,891.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,215.40 : 297,368.48 = 85,914.40 : x
  2. Step 2: Convert to fraction form
    198,215.40/297,368.48 = 85,914.40/x
  3. Step 3: Cross multiply
    198,215.40x = 297,368.48 × 85,914.40
  4. Step 4: Simplify right side
    198,215.40x = 25,548,234,538.11
  5. Step 5: Solve for x
    x = 25,548,234,538.11/198,215.40
  6. Step 6: Final answer
    x = 128,891.27

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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.