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Finding the Fourth Proportional to 138,291, 190,864.62 and 104,698.68

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Solution

The fourth proportional to 138,291, 190,864.62 and 104,698.68 is: 144,501.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,291 : 190,864.62 = 104,698.68 : x
  2. Step 2: Convert to fraction form
    138,291/190,864.62 = 104,698.68/x
  3. Step 3: Cross multiply
    138,291x = 190,864.62 × 104,698.68
  4. Step 4: Simplify right side
    138,291x = 19,983,273,772.70
  5. Step 5: Solve for x
    x = 19,983,273,772.70/138,291
  6. Step 6: Final answer
    x = 144,501.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.