Home / 203,071.12-280,237.11-111,188.73

Finding the Fourth Proportional to 203,071.12, 280,237.11 and 111,188.73

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Solution

The fourth proportional to 203,071.12, 280,237.11 and 111,188.73 is: 153,439.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,071.12 : 280,237.11 = 111,188.73 : x
  2. Step 2: Convert to fraction form
    203,071.12/280,237.11 = 111,188.73/x
  3. Step 3: Cross multiply
    203,071.12x = 280,237.11 × 111,188.73
  4. Step 4: Simplify right side
    203,071.12x = 31,159,209,931.86
  5. Step 5: Solve for x
    x = 31,159,209,931.86/203,071.12
  6. Step 6: Final answer
    x = 153,439.89

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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.