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Finding the Fourth Proportional to 203,431.39, 280,734.81 and 112,785.03

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Solution

The fourth proportional to 203,431.39, 280,734.81 and 112,785.03 is: 155,643.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,431.39 : 280,734.81 = 112,785.03 : x
  2. Step 2: Convert to fraction form
    203,431.39/280,734.81 = 112,785.03/x
  3. Step 3: Cross multiply
    203,431.39x = 280,734.81 × 112,785.03
  4. Step 4: Simplify right side
    203,431.39x = 31,662,683,967.89
  5. Step 5: Solve for x
    x = 31,662,683,967.89/203,431.39
  6. Step 6: Final answer
    x = 155,643.06

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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.