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Finding the Fourth Proportional to 203,538.85, 280,873.71 and 112,886.79

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Solution

The fourth proportional to 203,538.85, 280,873.71 and 112,886.79 is: 155,778.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,538.85 : 280,873.71 = 112,886.79 : x
  2. Step 2: Convert to fraction form
    203,538.85/280,873.71 = 112,886.79/x
  3. Step 3: Cross multiply
    203,538.85x = 280,873.71 × 112,886.79
  4. Step 4: Simplify right side
    203,538.85x = 31,706,931,517.29
  5. Step 5: Solve for x
    x = 31,706,931,517.29/203,538.85
  6. Step 6: Final answer
    x = 155,778.28

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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.