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Finding the Fourth Proportional to 203,363.12, 280,643.12 and 112,721.04

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Solution

The fourth proportional to 203,363.12, 280,643.12 and 112,721.04 is: 155,556.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,363.12 : 280,643.12 = 112,721.04 : x
  2. Step 2: Convert to fraction form
    203,363.12/280,643.12 = 112,721.04/x
  3. Step 3: Cross multiply
    203,363.12x = 280,643.12 × 112,721.04
  4. Step 4: Simplify right side
    203,363.12x = 31,634,384,355.24
  5. Step 5: Solve for x
    x = 31,634,384,355.24/203,363.12
  6. Step 6: Final answer
    x = 155,556.15

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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.