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Finding the Fourth Proportional to 203,431.52, 280,764.56 and 112,807.64

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Solution

The fourth proportional to 203,431.52, 280,764.56 and 112,807.64 is: 155,690.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,431.52 : 280,764.56 = 112,807.64 : x
  2. Step 2: Convert to fraction form
    203,431.52/280,764.56 = 112,807.64/x
  3. Step 3: Cross multiply
    203,431.52x = 280,764.56 × 112,807.64
  4. Step 4: Simplify right side
    203,431.52x = 31,672,387,409.24
  5. Step 5: Solve for x
    x = 31,672,387,409.24/203,431.52
  6. Step 6: Final answer
    x = 155,690.66

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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.