Home / 198,205.12-297,353.10-85,904.20

Finding the Fourth Proportional to 198,205.12, 297,353.10 and 85,904.20

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Solution

The fourth proportional to 198,205.12, 297,353.10 and 85,904.20 is: 128,875.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,205.12 : 297,353.10 = 85,904.20 : x
  2. Step 2: Convert to fraction form
    198,205.12/297,353.10 = 85,904.20/x
  3. Step 3: Cross multiply
    198,205.12x = 297,353.10 × 85,904.20
  4. Step 4: Simplify right side
    198,205.12x = 25,543,880,173.02
  5. Step 5: Solve for x
    x = 25,543,880,173.02/198,205.12
  6. Step 6: Final answer
    x = 128,875.99

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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.