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Finding the Fourth Proportional to 326,703.78, 489,994.92 and 102,069.72

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Solution

The fourth proportional to 326,703.78, 489,994.92 and 102,069.72 is: 153,085.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,703.78 : 489,994.92 = 102,069.72 : x
  2. Step 2: Convert to fraction form
    326,703.78/489,994.92 = 102,069.72/x
  3. Step 3: Cross multiply
    326,703.78x = 489,994.92 × 102,069.72
  4. Step 4: Simplify right side
    326,703.78x = 50,013,644,285.82
  5. Step 5: Solve for x
    x = 50,013,644,285.82/326,703.78
  6. Step 6: Final answer
    x = 153,085.60

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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.