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Finding the Fourth Proportional to 203,486.76, 280,826.12 and 112,851.40

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Solution

The fourth proportional to 203,486.76, 280,826.12 and 112,851.40 is: 155,742.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,486.76 : 280,826.12 = 112,851.40 : x
  2. Step 2: Convert to fraction form
    203,486.76/280,826.12 = 112,851.40/x
  3. Step 3: Cross multiply
    203,486.76x = 280,826.12 × 112,851.40
  4. Step 4: Simplify right side
    203,486.76x = 31,691,620,798.57
  5. Step 5: Solve for x
    x = 31,691,620,798.57/203,486.76
  6. Step 6: Final answer
    x = 155,742.91

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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.