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Finding the Fourth Proportional to 208,015.54, 286,970.28 and 121,930.89

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Solution

The fourth proportional to 208,015.54, 286,970.28 and 121,930.89 is: 168,211.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,015.54 : 286,970.28 = 121,930.89 : x
  2. Step 2: Convert to fraction form
    208,015.54/286,970.28 = 121,930.89/x
  3. Step 3: Cross multiply
    208,015.54x = 286,970.28 × 121,930.89
  4. Step 4: Simplify right side
    208,015.54x = 34,990,540,110.57
  5. Step 5: Solve for x
    x = 34,990,540,110.57/208,015.54
  6. Step 6: Final answer
    x = 168,211.18

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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.