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Finding the Fourth Proportional to 213,617.70, 320,455.35 and 73,419.30

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Solution

The fourth proportional to 213,617.70, 320,455.35 and 73,419.30 is: 110,138.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,617.70 : 320,455.35 = 73,419.30 : x
  2. Step 2: Convert to fraction form
    213,617.70/320,455.35 = 73,419.30/x
  3. Step 3: Cross multiply
    213,617.70x = 320,455.35 × 73,419.30
  4. Step 4: Simplify right side
    213,617.70x = 23,527,607,478.26
  5. Step 5: Solve for x
    x = 23,527,607,478.26/213,617.70
  6. Step 6: Final answer
    x = 110,138.85

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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.