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Finding the Fourth Proportional to 133,049.40, 199,574.10 and 85,810.20

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Solution

The fourth proportional to 133,049.40, 199,574.10 and 85,810.20 is: 128,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,049.40 : 199,574.10 = 85,810.20 : x
  2. Step 2: Convert to fraction form
    133,049.40/199,574.10 = 85,810.20/x
  3. Step 3: Cross multiply
    133,049.40x = 199,574.10 × 85,810.20
  4. Step 4: Simplify right side
    133,049.40x = 17,125,493,435.82
  5. Step 5: Solve for x
    x = 17,125,493,435.82/133,049.40
  6. Step 6: Final answer
    x = 128,715.30

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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.