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Finding the Fourth Proportional to 200,318.40, 300,040.20 and 121,294.80

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Solution

The fourth proportional to 200,318.40, 300,040.20 and 121,294.80 is: 181,677.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,318.40 : 300,040.20 = 121,294.80 : x
  2. Step 2: Convert to fraction form
    200,318.40/300,040.20 = 121,294.80/x
  3. Step 3: Cross multiply
    200,318.40x = 300,040.20 × 121,294.80
  4. Step 4: Simplify right side
    200,318.40x = 36,393,316,050.96
  5. Step 5: Solve for x
    x = 36,393,316,050.96/200,318.40
  6. Step 6: Final answer
    x = 181,677.35

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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.