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Finding the Fourth Proportional to 136,659.76, 188,590.76 and 76,228.88

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Solution

The fourth proportional to 136,659.76, 188,590.76 and 76,228.88 is: 105,196.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,659.76 : 188,590.76 = 76,228.88 : x
  2. Step 2: Convert to fraction form
    136,659.76/188,590.76 = 76,228.88/x
  3. Step 3: Cross multiply
    136,659.76x = 188,590.76 × 76,228.88
  4. Step 4: Simplify right side
    136,659.76x = 14,376,062,413.15
  5. Step 5: Solve for x
    x = 14,376,062,413.15/136,659.76
  6. Step 6: Final answer
    x = 105,196.02

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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.