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Finding the Fourth Proportional to 223,709.40, 335,564.10 and 139,728.60

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Solution

The fourth proportional to 223,709.40, 335,564.10 and 139,728.60 is: 209,592.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,709.40 : 335,564.10 = 139,728.60 : x
  2. Step 2: Convert to fraction form
    223,709.40/335,564.10 = 139,728.60/x
  3. Step 3: Cross multiply
    223,709.40x = 335,564.10 × 139,728.60
  4. Step 4: Simplify right side
    223,709.40x = 46,887,901,903.26
  5. Step 5: Solve for x
    x = 46,887,901,903.26/223,709.40
  6. Step 6: Final answer
    x = 209,592.90

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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.