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Finding the Fourth Proportional to 121,621.32, 167,745.03 and 104,653.98

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Solution

The fourth proportional to 121,621.32, 167,745.03 and 104,653.98 is: 144,342.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,621.32 : 167,745.03 = 104,653.98 : x
  2. Step 2: Convert to fraction form
    121,621.32/167,745.03 = 104,653.98/x
  3. Step 3: Cross multiply
    121,621.32x = 167,745.03 × 104,653.98
  4. Step 4: Simplify right side
    121,621.32x = 17,555,185,014.72
  5. Step 5: Solve for x
    x = 17,555,185,014.72/121,621.32
  6. Step 6: Final answer
    x = 144,342.99

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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.