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Finding the Fourth Proportional to 144,879.40, 217,383.90 and 69,970.60

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Solution

The fourth proportional to 144,879.40, 217,383.90 and 69,970.60 is: 104,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,879.40 : 217,383.90 = 69,970.60 : x
  2. Step 2: Convert to fraction form
    144,879.40/217,383.90 = 69,970.60/x
  3. Step 3: Cross multiply
    144,879.40x = 217,383.90 × 69,970.60
  4. Step 4: Simplify right side
    144,879.40x = 15,210,481,913.34
  5. Step 5: Solve for x
    x = 15,210,481,913.34/144,879.40
  6. Step 6: Final answer
    x = 104,987.20

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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.