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Finding the Fourth Proportional to 77,879.20, 116,847.60 and 74,999.20

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Solution

The fourth proportional to 77,879.20, 116,847.60 and 74,999.20 is: 112,526.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,879.20 : 116,847.60 = 74,999.20 : x
  2. Step 2: Convert to fraction form
    77,879.20/116,847.60 = 74,999.20/x
  3. Step 3: Cross multiply
    77,879.20x = 116,847.60 × 74,999.20
  4. Step 4: Simplify right side
    77,879.20x = 8,763,476,521.92
  5. Step 5: Solve for x
    x = 8,763,476,521.92/77,879.20
  6. Step 6: Final answer
    x = 112,526.53

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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.