Home / 72,741.02-109,099.14-20,138.18

Finding the Fourth Proportional to 72,741.02, 109,099.14 and 20,138.18

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Solution

The fourth proportional to 72,741.02, 109,099.14 and 20,138.18 is: 30,203.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,741.02 : 109,099.14 = 20,138.18 : x
  2. Step 2: Convert to fraction form
    72,741.02/109,099.14 = 20,138.18/x
  3. Step 3: Cross multiply
    72,741.02x = 109,099.14 × 20,138.18
  4. Step 4: Simplify right side
    72,741.02x = 2,197,058,119.17
  5. Step 5: Solve for x
    x = 2,197,058,119.17/72,741.02
  6. Step 6: Final answer
    x = 30,203.84

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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.