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Finding the Fourth Proportional to 326,611.77, 489,726.96 and 126,698.55

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Solution

The fourth proportional to 326,611.77, 489,726.96 and 126,698.55 is: 189,973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,611.77 : 489,726.96 = 126,698.55 : x
  2. Step 2: Convert to fraction form
    326,611.77/489,726.96 = 126,698.55/x
  3. Step 3: Cross multiply
    326,611.77x = 489,726.96 × 126,698.55
  4. Step 4: Simplify right side
    326,611.77x = 62,047,695,727.91
  5. Step 5: Solve for x
    x = 62,047,695,727.91/326,611.77
  6. Step 6: Final answer
    x = 189,973.85

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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.