Home / 128,739.26-193,121.30-39,968.93

Finding the Fourth Proportional to 128,739.26, 193,121.30 and 39,968.93

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Solution

The fourth proportional to 128,739.26, 193,121.30 and 39,968.93 is: 59,957.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,739.26 : 193,121.30 = 39,968.93 : x
  2. Step 2: Convert to fraction form
    128,739.26/193,121.30 = 39,968.93/x
  3. Step 3: Cross multiply
    128,739.26x = 193,121.30 × 39,968.93
  4. Step 4: Simplify right side
    128,739.26x = 7,718,851,238.41
  5. Step 5: Solve for x
    x = 7,718,851,238.41/128,739.26
  6. Step 6: Final answer
    x = 59,957.25

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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.