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Finding the Fourth Proportional to 207,473.40, 311,501.70 and 128,741.40

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Solution

The fourth proportional to 207,473.40, 311,501.70 and 128,741.40 is: 193,293.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,473.40 : 311,501.70 = 128,741.40 : x
  2. Step 2: Convert to fraction form
    207,473.40/311,501.70 = 128,741.40/x
  3. Step 3: Cross multiply
    207,473.40x = 311,501.70 × 128,741.40
  4. Step 4: Simplify right side
    207,473.40x = 40,103,164,960.38
  5. Step 5: Solve for x
    x = 40,103,164,960.38/207,473.40
  6. Step 6: Final answer
    x = 193,293.04

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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.