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Finding the Fourth Proportional to 163,080.70, 244,621.05 and 78,881.20

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Solution

The fourth proportional to 163,080.70, 244,621.05 and 78,881.20 is: 118,321.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,080.70 : 244,621.05 = 78,881.20 : x
  2. Step 2: Convert to fraction form
    163,080.70/244,621.05 = 78,881.20/x
  3. Step 3: Cross multiply
    163,080.70x = 244,621.05 × 78,881.20
  4. Step 4: Simplify right side
    163,080.70x = 19,296,001,969.26
  5. Step 5: Solve for x
    x = 19,296,001,969.26/163,080.70
  6. Step 6: Final answer
    x = 118,321.80

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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.