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Finding the Fourth Proportional to 144,698.59, 199,634.08 and 90,987.69

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Solution

The fourth proportional to 144,698.59, 199,634.08 and 90,987.69 is: 125,531.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,698.59 : 199,634.08 = 90,987.69 : x
  2. Step 2: Convert to fraction form
    144,698.59/199,634.08 = 90,987.69/x
  3. Step 3: Cross multiply
    144,698.59x = 199,634.08 × 90,987.69
  4. Step 4: Simplify right side
    144,698.59x = 18,164,243,784.48
  5. Step 5: Solve for x
    x = 18,164,243,784.48/144,698.59
  6. Step 6: Final answer
    x = 125,531.59

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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.