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Finding the Fourth Proportional to 203,426.74, 280,745.45 and 112,811.10

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Solution

The fourth proportional to 203,426.74, 280,745.45 and 112,811.10 is: 155,688.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,426.74 : 280,745.45 = 112,811.10 : x
  2. Step 2: Convert to fraction form
    203,426.74/280,745.45 = 112,811.10/x
  3. Step 3: Cross multiply
    203,426.74x = 280,745.45 × 112,811.10
  4. Step 4: Simplify right side
    203,426.74x = 31,671,203,034.50
  5. Step 5: Solve for x
    x = 31,671,203,034.50/203,426.74
  6. Step 6: Final answer
    x = 155,688.50

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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.