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Finding the Fourth Proportional to 128,682.48, 192,976.32 and 44,421.14

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Solution

The fourth proportional to 128,682.48, 192,976.32 and 44,421.14 is: 66,615.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,682.48 : 192,976.32 = 44,421.14 : x
  2. Step 2: Convert to fraction form
    128,682.48/192,976.32 = 44,421.14/x
  3. Step 3: Cross multiply
    128,682.48x = 192,976.32 × 44,421.14
  4. Step 4: Simplify right side
    128,682.48x = 8,572,228,127.40
  5. Step 5: Solve for x
    x = 8,572,228,127.40/128,682.48
  6. Step 6: Final answer
    x = 66,615.35

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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.