Home / 128,791.72-193,298.75-89,376.51

Finding the Fourth Proportional to 128,791.72, 193,298.75 and 89,376.51

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Solution

The fourth proportional to 128,791.72, 193,298.75 and 89,376.51 is: 134,141.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,791.72 : 193,298.75 = 89,376.51 : x
  2. Step 2: Convert to fraction form
    128,791.72/193,298.75 = 89,376.51/x
  3. Step 3: Cross multiply
    128,791.72x = 193,298.75 × 89,376.51
  4. Step 4: Simplify right side
    128,791.72x = 17,276,368,778.26
  5. Step 5: Solve for x
    x = 17,276,368,778.26/128,791.72
  6. Step 6: Final answer
    x = 134,141.92

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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.