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Finding the Fourth Proportional to 203,356.40, 280,648.62 and 112,740.79

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Solution

The fourth proportional to 203,356.40, 280,648.62 and 112,740.79 is: 155,591.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,356.40 : 280,648.62 = 112,740.79 : x
  2. Step 2: Convert to fraction form
    203,356.40/280,648.62 = 112,740.79/x
  3. Step 3: Cross multiply
    203,356.40x = 280,648.62 × 112,740.79
  4. Step 4: Simplify right side
    203,356.40x = 31,640,547,131.21
  5. Step 5: Solve for x
    x = 31,640,547,131.21/203,356.40
  6. Step 6: Final answer
    x = 155,591.60

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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.