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Finding the Fourth Proportional to 386,092.86, 579,139.29 and 105,612.54

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Solution

The fourth proportional to 386,092.86, 579,139.29 and 105,612.54 is: 158,418.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,092.86 : 579,139.29 = 105,612.54 : x
  2. Step 2: Convert to fraction form
    386,092.86/579,139.29 = 105,612.54/x
  3. Step 3: Cross multiply
    386,092.86x = 579,139.29 × 105,612.54
  4. Step 4: Simplify right side
    386,092.86x = 61,164,371,430.70
  5. Step 5: Solve for x
    x = 61,164,371,430.70/386,092.86
  6. Step 6: Final answer
    x = 158,418.81

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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.