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Finding the Fourth Proportional to 208,486.52, 287,710.26 and 112,992.20

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Solution

The fourth proportional to 208,486.52, 287,710.26 and 112,992.20 is: 155,928.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,486.52 : 287,710.26 = 112,992.20 : x
  2. Step 2: Convert to fraction form
    208,486.52/287,710.26 = 112,992.20/x
  3. Step 3: Cross multiply
    208,486.52x = 287,710.26 × 112,992.20
  4. Step 4: Simplify right side
    208,486.52x = 32,509,015,239.97
  5. Step 5: Solve for x
    x = 32,509,015,239.97/208,486.52
  6. Step 6: Final answer
    x = 155,928.62

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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.