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Finding the Fourth Proportional to 154,654.68, 213,413.34 and 90,980.19

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Solution

The fourth proportional to 154,654.68, 213,413.34 and 90,980.19 is: 125,546.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,654.68 : 213,413.34 = 90,980.19 : x
  2. Step 2: Convert to fraction form
    154,654.68/213,413.34 = 90,980.19/x
  3. Step 3: Cross multiply
    154,654.68x = 213,413.34 × 90,980.19
  4. Step 4: Simplify right side
    154,654.68x = 19,416,386,221.73
  5. Step 5: Solve for x
    x = 19,416,386,221.73/154,654.68
  6. Step 6: Final answer
    x = 125,546.71

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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.