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Finding the Fourth Proportional to 108,647.04, 149,932.80 and 66,205.68

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Solution

The fourth proportional to 108,647.04, 149,932.80 and 66,205.68 is: 91,363.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,647.04 : 149,932.80 = 66,205.68 : x
  2. Step 2: Convert to fraction form
    108,647.04/149,932.80 = 66,205.68/x
  3. Step 3: Cross multiply
    108,647.04x = 149,932.80 × 66,205.68
  4. Step 4: Simplify right side
    108,647.04x = 9,926,402,978.30
  5. Step 5: Solve for x
    x = 9,926,402,978.30/108,647.04
  6. Step 6: Final answer
    x = 91,363.77

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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.