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Finding the Fourth Proportional to 128,051.69, 191,612.70 and 92,584.04

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Solution

The fourth proportional to 128,051.69, 191,612.70 and 92,584.04 is: 138,539.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,051.69 : 191,612.70 = 92,584.04 : x
  2. Step 2: Convert to fraction form
    128,051.69/191,612.70 = 92,584.04/x
  3. Step 3: Cross multiply
    128,051.69x = 191,612.70 × 92,584.04
  4. Step 4: Simplify right side
    128,051.69x = 17,740,276,923.24
  5. Step 5: Solve for x
    x = 17,740,276,923.24/128,051.69
  6. Step 6: Final answer
    x = 138,539.97

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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.