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Finding the Fourth Proportional to 208,202.90, 287,320.91 and 112,709.59

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Solution

The fourth proportional to 208,202.90, 287,320.91 and 112,709.59 is: 155,539.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,202.90 : 287,320.91 = 112,709.59 : x
  2. Step 2: Convert to fraction form
    208,202.90/287,320.91 = 112,709.59/x
  3. Step 3: Cross multiply
    208,202.90x = 287,320.91 × 112,709.59
  4. Step 4: Simplify right side
    208,202.90x = 32,383,820,682.68
  5. Step 5: Solve for x
    x = 32,383,820,682.68/208,202.90
  6. Step 6: Final answer
    x = 155,539.72

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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.