Home / 128,548.16-193,118.24-91,200.96

Finding the Fourth Proportional to 128,548.16, 193,118.24 and 91,200.96

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Solution

The fourth proportional to 128,548.16, 193,118.24 and 91,200.96 is: 137,011.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,548.16 : 193,118.24 = 91,200.96 : x
  2. Step 2: Convert to fraction form
    128,548.16/193,118.24 = 91,200.96/x
  3. Step 3: Cross multiply
    128,548.16x = 193,118.24 × 91,200.96
  4. Step 4: Simplify right side
    128,548.16x = 17,612,568,881.51
  5. Step 5: Solve for x
    x = 17,612,568,881.51/128,548.16
  6. Step 6: Final answer
    x = 137,011.44

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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.