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Finding the Fourth Proportional to 203,070, 280,197.70 and 131,440.08

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Solution

The fourth proportional to 203,070, 280,197.70 and 131,440.08 is: 181,362.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,070 : 280,197.70 = 131,440.08 : x
  2. Step 2: Convert to fraction form
    203,070/280,197.70 = 131,440.08/x
  3. Step 3: Cross multiply
    203,070x = 280,197.70 × 131,440.08
  4. Step 4: Simplify right side
    203,070x = 36,829,208,103.82
  5. Step 5: Solve for x
    x = 36,829,208,103.82/203,070
  6. Step 6: Final answer
    x = 181,362.13

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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.