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Finding the Fourth Proportional to 203,520.83, 280,875.95 and 112,905.96

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Solution

The fourth proportional to 203,520.83, 280,875.95 and 112,905.96 is: 155,819.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,520.83 : 280,875.95 = 112,905.96 : x
  2. Step 2: Convert to fraction form
    203,520.83/280,875.95 = 112,905.96/x
  3. Step 3: Cross multiply
    203,520.83x = 280,875.95 × 112,905.96
  4. Step 4: Simplify right side
    203,520.83x = 31,712,568,211.13
  5. Step 5: Solve for x
    x = 31,712,568,211.13/203,520.83
  6. Step 6: Final answer
    x = 155,819.77

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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.