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Finding the Fourth Proportional to 203,428.46, 280,731.35 and 112,785.55

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Solution

The fourth proportional to 203,428.46, 280,731.35 and 112,785.55 is: 155,644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,428.46 : 280,731.35 = 112,785.55 : x
  2. Step 2: Convert to fraction form
    203,428.46/280,731.35 = 112,785.55/x
  3. Step 3: Cross multiply
    203,428.46x = 280,731.35 × 112,785.55
  4. Step 4: Simplify right side
    203,428.46x = 31,662,439,292.13
  5. Step 5: Solve for x
    x = 31,662,439,292.13/203,428.46
  6. Step 6: Final answer
    x = 155,644.10

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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.