Home / 128,743.33-193,168.34-69,509.38

Finding the Fourth Proportional to 128,743.33, 193,168.34 and 69,509.38

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Solution

The fourth proportional to 128,743.33, 193,168.34 and 69,509.38 is: 104,292.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,743.33 : 193,168.34 = 69,509.38 : x
  2. Step 2: Convert to fraction form
    128,743.33/193,168.34 = 69,509.38/x
  3. Step 3: Cross multiply
    128,743.33x = 193,168.34 × 69,509.38
  4. Step 4: Simplify right side
    128,743.33x = 13,427,011,549.03
  5. Step 5: Solve for x
    x = 13,427,011,549.03/128,743.33
  6. Step 6: Final answer
    x = 104,292.87

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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.