Home / 128,736.47-193,158-69,502.48

Finding the Fourth Proportional to 128,736.47, 193,158 and 69,502.48

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Solution

The fourth proportional to 128,736.47, 193,158 and 69,502.48 is: 104,282.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736.47 : 193,158 = 69,502.48 : x
  2. Step 2: Convert to fraction form
    128,736.47/193,158 = 69,502.48/x
  3. Step 3: Cross multiply
    128,736.47x = 193,158 × 69,502.48
  4. Step 4: Simplify right side
    128,736.47x = 13,424,959,548.95
  5. Step 5: Solve for x
    x = 13,424,959,548.95/128,736.47
  6. Step 6: Final answer
    x = 104,282.49

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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.