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Finding the Fourth Proportional to 103,749.60, 155,405.70 and 92,668.80

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Solution

The fourth proportional to 103,749.60, 155,405.70 and 92,668.80 is: 138,807.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,749.60 : 155,405.70 = 92,668.80 : x
  2. Step 2: Convert to fraction form
    103,749.60/155,405.70 = 92,668.80/x
  3. Step 3: Cross multiply
    103,749.60x = 155,405.70 × 92,668.80
  4. Step 4: Simplify right side
    103,749.60x = 14,401,259,732.16
  5. Step 5: Solve for x
    x = 14,401,259,732.16/103,749.60
  6. Step 6: Final answer
    x = 138,807.86

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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.