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Finding the Fourth Proportional to 208,788.77, 288,112.67 and 122,751.29

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Solution

The fourth proportional to 208,788.77, 288,112.67 and 122,751.29 is: 169,387.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,788.77 : 288,112.67 = 122,751.29 : x
  2. Step 2: Convert to fraction form
    208,788.77/288,112.67 = 122,751.29/x
  3. Step 3: Cross multiply
    208,788.77x = 288,112.67 × 122,751.29
  4. Step 4: Simplify right side
    208,788.77x = 35,366,199,853.52
  5. Step 5: Solve for x
    x = 35,366,199,853.52/208,788.77
  6. Step 6: Final answer
    x = 169,387.47

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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.