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Finding the Fourth Proportional to 203,518.80, 280,873.20 and 112,903.98

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Solution

The fourth proportional to 203,518.80, 280,873.20 and 112,903.98 is: 155,817.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,518.80 : 280,873.20 = 112,903.98 : x
  2. Step 2: Convert to fraction form
    203,518.80/280,873.20 = 112,903.98/x
  3. Step 3: Cross multiply
    203,518.80x = 280,873.20 × 112,903.98
  4. Step 4: Simplify right side
    203,518.80x = 31,711,702,155.34
  5. Step 5: Solve for x
    x = 31,711,702,155.34/203,518.80
  6. Step 6: Final answer
    x = 155,817.07

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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.