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Finding the Fourth Proportional to 208,678.96, 287,881.32 and 123,765.04

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Solution

The fourth proportional to 208,678.96, 287,881.32 and 123,765.04 is: 170,739.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,678.96 : 287,881.32 = 123,765.04 : x
  2. Step 2: Convert to fraction form
    208,678.96/287,881.32 = 123,765.04/x
  3. Step 3: Cross multiply
    208,678.96x = 287,881.32 × 123,765.04
  4. Step 4: Simplify right side
    208,678.96x = 35,629,643,085.05
  5. Step 5: Solve for x
    x = 35,629,643,085.05/208,678.96
  6. Step 6: Final answer
    x = 170,739.03

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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.