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Finding the Fourth Proportional to 105,579.78, 158,527.80 and 91,392.30

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Solution

The fourth proportional to 105,579.78, 158,527.80 and 91,392.30 is: 137,225.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,579.78 : 158,527.80 = 91,392.30 : x
  2. Step 2: Convert to fraction form
    105,579.78/158,527.80 = 91,392.30/x
  3. Step 3: Cross multiply
    105,579.78x = 158,527.80 × 91,392.30
  4. Step 4: Simplify right side
    105,579.78x = 14,488,220,255.94
  5. Step 5: Solve for x
    x = 14,488,220,255.94/105,579.78
  6. Step 6: Final answer
    x = 137,225.33

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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.