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Finding the Fourth Proportional to 199,431.40, 299,147.10 and 74,756.20

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Solution

The fourth proportional to 199,431.40, 299,147.10 and 74,756.20 is: 112,134.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,431.40 : 299,147.10 = 74,756.20 : x
  2. Step 2: Convert to fraction form
    199,431.40/299,147.10 = 74,756.20/x
  3. Step 3: Cross multiply
    199,431.40x = 299,147.10 × 74,756.20
  4. Step 4: Simplify right side
    199,431.40x = 22,363,100,437.02
  5. Step 5: Solve for x
    x = 22,363,100,437.02/199,431.40
  6. Step 6: Final answer
    x = 112,134.30

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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.