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Finding the Fourth Proportional to 326,051.80, 489,077.70 and 136,479.40

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Solution

The fourth proportional to 326,051.80, 489,077.70 and 136,479.40 is: 204,719.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,051.80 : 489,077.70 = 136,479.40 : x
  2. Step 2: Convert to fraction form
    326,051.80/489,077.70 = 136,479.40/x
  3. Step 3: Cross multiply
    326,051.80x = 489,077.70 × 136,479.40
  4. Step 4: Simplify right side
    326,051.80x = 66,749,031,049.38
  5. Step 5: Solve for x
    x = 66,749,031,049.38/326,051.80
  6. Step 6: Final answer
    x = 204,719.10

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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.