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Finding the Fourth Proportional to 219,955.60, 329,991.44 and 86,803.48

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Solution

The fourth proportional to 219,955.60, 329,991.44 and 86,803.48 is: 130,228.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,955.60 : 329,991.44 = 86,803.48 : x
  2. Step 2: Convert to fraction form
    219,955.60/329,991.44 = 86,803.48/x
  3. Step 3: Cross multiply
    219,955.60x = 329,991.44 × 86,803.48
  4. Step 4: Simplify right side
    219,955.60x = 28,644,405,362.21
  5. Step 5: Solve for x
    x = 28,644,405,362.21/219,955.60
  6. Step 6: Final answer
    x = 130,228.12

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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.