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Finding the Fourth Proportional to 109,312.94, 150,858.35 and 66,879.68

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Solution

The fourth proportional to 109,312.94, 150,858.35 and 66,879.68 is: 92,297.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,312.94 : 150,858.35 = 66,879.68 : x
  2. Step 2: Convert to fraction form
    109,312.94/150,858.35 = 66,879.68/x
  3. Step 3: Cross multiply
    109,312.94x = 150,858.35 × 66,879.68
  4. Step 4: Simplify right side
    109,312.94x = 10,089,357,335.44
  5. Step 5: Solve for x
    x = 10,089,357,335.44/109,312.94
  6. Step 6: Final answer
    x = 92,297.92

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1.5x scale

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.