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Finding the Fourth Proportional to 208,383.22, 287,568.56 and 112,890.30

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Solution

The fourth proportional to 208,383.22, 287,568.56 and 112,890.30 is: 155,788.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,383.22 : 287,568.56 = 112,890.30 : x
  2. Step 2: Convert to fraction form
    208,383.22/287,568.56 = 112,890.30/x
  3. Step 3: Cross multiply
    208,383.22x = 287,568.56 × 112,890.30
  4. Step 4: Simplify right side
    208,383.22x = 32,463,701,008.97
  5. Step 5: Solve for x
    x = 32,463,701,008.97/208,383.22
  6. Step 6: Final answer
    x = 155,788.46

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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.