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Finding the Fourth Proportional to 208,113.82, 287,197.07 and 112,620.51

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Solution

The fourth proportional to 208,113.82, 287,197.07 and 112,620.51 is: 155,416.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,113.82 : 287,197.07 = 112,620.51 : x
  2. Step 2: Convert to fraction form
    208,113.82/287,197.07 = 112,620.51/x
  3. Step 3: Cross multiply
    208,113.82x = 287,197.07 × 112,620.51
  4. Step 4: Simplify right side
    208,113.82x = 32,344,279,930.80
  5. Step 5: Solve for x
    x = 32,344,279,930.80/208,113.82
  6. Step 6: Final answer
    x = 155,416.30

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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.