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Finding the Fourth Proportional to 209,854.40, 314,781.60 and 85,284.80

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Solution

The fourth proportional to 209,854.40, 314,781.60 and 85,284.80 is: 127,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,854.40 : 314,781.60 = 85,284.80 : x
  2. Step 2: Convert to fraction form
    209,854.40/314,781.60 = 85,284.80/x
  3. Step 3: Cross multiply
    209,854.40x = 314,781.60 × 85,284.80
  4. Step 4: Simplify right side
    209,854.40x = 26,846,085,799.68
  5. Step 5: Solve for x
    x = 26,846,085,799.68/209,854.40
  6. Step 6: Final answer
    x = 127,927.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.