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Finding the Fourth Proportional to 108,821.68, 150,029.56 and 71,030.32

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Solution

The fourth proportional to 108,821.68, 150,029.56 and 71,030.32 is: 97,927.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,821.68 : 150,029.56 = 71,030.32 : x
  2. Step 2: Convert to fraction form
    108,821.68/150,029.56 = 71,030.32/x
  3. Step 3: Cross multiply
    108,821.68x = 150,029.56 × 71,030.32
  4. Step 4: Simplify right side
    108,821.68x = 10,656,647,656.26
  5. Step 5: Solve for x
    x = 10,656,647,656.26/108,821.68
  6. Step 6: Final answer
    x = 97,927.62

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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.