Home / 128,814.40-193,231.20-45,697.60

Finding the Fourth Proportional to 128,814.40, 193,231.20 and 45,697.60

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Solution

The fourth proportional to 128,814.40, 193,231.20 and 45,697.60 is: 68,549.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,814.40 : 193,231.20 = 45,697.60 : x
  2. Step 2: Convert to fraction form
    128,814.40/193,231.20 = 45,697.60/x
  3. Step 3: Cross multiply
    128,814.40x = 193,231.20 × 45,697.60
  4. Step 4: Simplify right side
    128,814.40x = 8,830,202,085.12
  5. Step 5: Solve for x
    x = 8,830,202,085.12/128,814.40
  6. Step 6: Final answer
    x = 68,549.81

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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.