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Finding the Fourth Proportional to 73,999.60, 110,999.40 and 66,857.20

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Solution

The fourth proportional to 73,999.60, 110,999.40 and 66,857.20 is: 100,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,999.60 : 110,999.40 = 66,857.20 : x
  2. Step 2: Convert to fraction form
    73,999.60/110,999.40 = 66,857.20/x
  3. Step 3: Cross multiply
    73,999.60x = 110,999.40 × 66,857.20
  4. Step 4: Simplify right side
    73,999.60x = 7,421,109,085.68
  5. Step 5: Solve for x
    x = 7,421,109,085.68/73,999.60
  6. Step 6: Final answer
    x = 100,285.80

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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.