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Finding the Fourth Proportional to 105,991.74, 158,987.61 and 53,445.42

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Solution

The fourth proportional to 105,991.74, 158,987.61 and 53,445.42 is: 80,168.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,991.74 : 158,987.61 = 53,445.42 : x
  2. Step 2: Convert to fraction form
    105,991.74/158,987.61 = 53,445.42/x
  3. Step 3: Cross multiply
    105,991.74x = 158,987.61 × 53,445.42
  4. Step 4: Simplify right side
    105,991.74x = 8,497,159,591.25
  5. Step 5: Solve for x
    x = 8,497,159,591.25/105,991.74
  6. Step 6: Final answer
    x = 80,168.13

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Similar ratio
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1.5x scale

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.