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Finding the Fourth Proportional to 190,668.55, 285,832.85 and 72,422.93

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Solution

The fourth proportional to 190,668.55, 285,832.85 and 72,422.93 is: 108,569.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,668.55 : 285,832.85 = 72,422.93 : x
  2. Step 2: Convert to fraction form
    190,668.55/285,832.85 = 72,422.93/x
  3. Step 3: Cross multiply
    190,668.55x = 285,832.85 × 72,422.93
  4. Step 4: Simplify right side
    190,668.55x = 20,700,852,487.25
  5. Step 5: Solve for x
    x = 20,700,852,487.25/190,668.55
  6. Step 6: Final answer
    x = 108,569.83

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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.