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Finding the Fourth Proportional to 203,515.05, 280,868.01 and 112,900.20

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Solution

The fourth proportional to 203,515.05, 280,868.01 and 112,900.20 is: 155,811.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,515.05 : 280,868.01 = 112,900.20 : x
  2. Step 2: Convert to fraction form
    203,515.05/280,868.01 = 112,900.20/x
  3. Step 3: Cross multiply
    203,515.05x = 280,868.01 × 112,900.20
  4. Step 4: Simplify right side
    203,515.05x = 31,710,054,502.60
  5. Step 5: Solve for x
    x = 31,710,054,502.60/203,515.05
  6. Step 6: Final answer
    x = 155,811.84

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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.