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Finding the Fourth Proportional to 203,970.15, 281,251.89 and 139,449.90

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Solution

The fourth proportional to 203,970.15, 281,251.89 and 139,449.90 is: 192,285.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,970.15 : 281,251.89 = 139,449.90 : x
  2. Step 2: Convert to fraction form
    203,970.15/281,251.89 = 139,449.90/x
  3. Step 3: Cross multiply
    203,970.15x = 281,251.89 × 139,449.90
  4. Step 4: Simplify right side
    203,970.15x = 39,220,547,935.31
  5. Step 5: Solve for x
    x = 39,220,547,935.31/203,970.15
  6. Step 6: Final answer
    x = 192,285.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.