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Finding the Fourth Proportional to 203,555.40, 305,333.10 and 140,569.80

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Solution

The fourth proportional to 203,555.40, 305,333.10 and 140,569.80 is: 210,854.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,555.40 : 305,333.10 = 140,569.80 : x
  2. Step 2: Convert to fraction form
    203,555.40/305,333.10 = 140,569.80/x
  3. Step 3: Cross multiply
    203,555.40x = 305,333.10 × 140,569.80
  4. Step 4: Simplify right side
    203,555.40x = 42,920,612,800.38
  5. Step 5: Solve for x
    x = 42,920,612,800.38/203,555.40
  6. Step 6: Final answer
    x = 210,854.70

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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.