Home / 128,816.50-193,245.40-40,090.52

Finding the Fourth Proportional to 128,816.50, 193,245.40 and 40,090.52

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Solution

The fourth proportional to 128,816.50, 193,245.40 and 40,090.52 is: 60,142.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,816.50 : 193,245.40 = 40,090.52 : x
  2. Step 2: Convert to fraction form
    128,816.50/193,245.40 = 40,090.52/x
  3. Step 3: Cross multiply
    128,816.50x = 193,245.40 × 40,090.52
  4. Step 4: Simplify right side
    128,816.50x = 7,747,308,573.61
  5. Step 5: Solve for x
    x = 7,747,308,573.61/128,816.50
  6. Step 6: Final answer
    x = 60,142.21

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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.