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Finding the Fourth Proportional to 286,358.73, 429,552.96 and 73,128.66

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Solution

The fourth proportional to 286,358.73, 429,552.96 and 73,128.66 is: 109,696.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,358.73 : 429,552.96 = 73,128.66 : x
  2. Step 2: Convert to fraction form
    286,358.73/429,552.96 = 73,128.66/x
  3. Step 3: Cross multiply
    286,358.73x = 429,552.96 × 73,128.66
  4. Step 4: Simplify right side
    286,358.73x = 31,412,632,363.83
  5. Step 5: Solve for x
    x = 31,412,632,363.83/286,358.73
  6. Step 6: Final answer
    x = 109,696.79

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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.