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Finding the Fourth Proportional to 108,780, 150,116.45 and 66,347.34

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Solution

The fourth proportional to 108,780, 150,116.45 and 66,347.34 is: 91,559.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,780 : 150,116.45 = 66,347.34 : x
  2. Step 2: Convert to fraction form
    108,780/150,116.45 = 66,347.34/x
  3. Step 3: Cross multiply
    108,780x = 150,116.45 × 66,347.34
  4. Step 4: Simplify right side
    108,780x = 9,959,826,816.01
  5. Step 5: Solve for x
    x = 9,959,826,816.01/108,780
  6. Step 6: Final answer
    x = 91,559.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.