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Finding the Fourth Proportional to 208,335.60, 287,520.80 and 117,708.20

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Solution

The fourth proportional to 208,335.60, 287,520.80 and 117,708.20 is: 162,447.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,335.60 : 287,520.80 = 117,708.20 : x
  2. Step 2: Convert to fraction form
    208,335.60/287,520.80 = 117,708.20/x
  3. Step 3: Cross multiply
    208,335.60x = 287,520.80 × 117,708.20
  4. Step 4: Simplify right side
    208,335.60x = 33,843,555,830.56
  5. Step 5: Solve for x
    x = 33,843,555,830.56/208,335.60
  6. Step 6: Final answer
    x = 162,447.30

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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.