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Finding the Fourth Proportional to 208,577.39, 287,819.07 and 117,920.76

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Solution

The fourth proportional to 208,577.39, 287,819.07 and 117,920.76 is: 162,720.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,577.39 : 287,819.07 = 117,920.76 : x
  2. Step 2: Convert to fraction form
    208,577.39/287,819.07 = 117,920.76/x
  3. Step 3: Cross multiply
    208,577.39x = 287,819.07 × 117,920.76
  4. Step 4: Simplify right side
    208,577.39x = 33,939,843,476.89
  5. Step 5: Solve for x
    x = 33,939,843,476.89/208,577.39
  6. Step 6: Final answer
    x = 162,720.63

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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.