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Finding the Fourth Proportional to 208,121.54, 287,207.69 and 112,628.24

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Solution

The fourth proportional to 208,121.54, 287,207.69 and 112,628.24 is: 155,426.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,121.54 : 287,207.69 = 112,628.24 : x
  2. Step 2: Convert to fraction form
    208,121.54/287,207.69 = 112,628.24/x
  3. Step 3: Cross multiply
    208,121.54x = 287,207.69 × 112,628.24
  4. Step 4: Simplify right side
    208,121.54x = 32,347,694,639.99
  5. Step 5: Solve for x
    x = 32,347,694,639.99/208,121.54
  6. Step 6: Final answer
    x = 155,426.95

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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.