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Finding the Fourth Proportional to 208,474.78, 287,695.16 and 112,981.48

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Solution

The fourth proportional to 208,474.78, 287,695.16 and 112,981.48 is: 155,914.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,474.78 : 287,695.16 = 112,981.48 : x
  2. Step 2: Convert to fraction form
    208,474.78/287,695.16 = 112,981.48/x
  3. Step 3: Cross multiply
    208,474.78x = 287,695.16 × 112,981.48
  4. Step 4: Simplify right side
    208,474.78x = 32,504,224,965.64
  5. Step 5: Solve for x
    x = 32,504,224,965.64/208,474.78
  6. Step 6: Final answer
    x = 155,914.42

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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.