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Finding the Fourth Proportional to 101,222.60, 151,736.70 and 78,720.80

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Solution

The fourth proportional to 101,222.60, 151,736.70 and 78,720.80 is: 118,005.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,222.60 : 151,736.70 = 78,720.80 : x
  2. Step 2: Convert to fraction form
    101,222.60/151,736.70 = 78,720.80/x
  3. Step 3: Cross multiply
    101,222.60x = 151,736.70 × 78,720.80
  4. Step 4: Simplify right side
    101,222.60x = 11,944,834,413.36
  5. Step 5: Solve for x
    x = 11,944,834,413.36/101,222.60
  6. Step 6: Final answer
    x = 118,005.61

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1.5x scale

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.