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Finding the Fourth Proportional to 203,079.78, 280,240.95 and 112,429.38

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Solution

The fourth proportional to 203,079.78, 280,240.95 and 112,429.38 is: 155,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,079.78 : 280,240.95 = 112,429.38 : x
  2. Step 2: Convert to fraction form
    203,079.78/280,240.95 = 112,429.38/x
  3. Step 3: Cross multiply
    203,079.78x = 280,240.95 × 112,429.38
  4. Step 4: Simplify right side
    203,079.78x = 31,507,316,259.11
  5. Step 5: Solve for x
    x = 31,507,316,259.11/203,079.78
  6. Step 6: Final answer
    x = 155,147.48

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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.