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Finding the Fourth Proportional to 128,614.80, 192,987.80 and 58,484.96

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Solution

The fourth proportional to 128,614.80, 192,987.80 and 58,484.96 is: 87,757.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,614.80 : 192,987.80 = 58,484.96 : x
  2. Step 2: Convert to fraction form
    128,614.80/192,987.80 = 58,484.96/x
  3. Step 3: Cross multiply
    128,614.80x = 192,987.80 × 58,484.96
  4. Step 4: Simplify right side
    128,614.80x = 11,286,883,763.49
  5. Step 5: Solve for x
    x = 11,286,883,763.49/128,614.80
  6. Step 6: Final answer
    x = 87,757.27

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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.