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Finding the Fourth Proportional to 121,491.70, 182,237.55 and 77,314.30

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Solution

The fourth proportional to 121,491.70, 182,237.55 and 77,314.30 is: 115,971.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,491.70 : 182,237.55 = 77,314.30 : x
  2. Step 2: Convert to fraction form
    121,491.70/182,237.55 = 77,314.30/x
  3. Step 3: Cross multiply
    121,491.70x = 182,237.55 × 77,314.30
  4. Step 4: Simplify right side
    121,491.70x = 14,089,568,611.97
  5. Step 5: Solve for x
    x = 14,089,568,611.97/121,491.70
  6. Step 6: Final answer
    x = 115,971.45

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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.