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Finding the Fourth Proportional to 108,543.98, 149,790.69 and 66,102.51

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Solution

The fourth proportional to 108,543.98, 149,790.69 and 66,102.51 is: 91,221.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,543.98 : 149,790.69 = 66,102.51 : x
  2. Step 2: Convert to fraction form
    108,543.98/149,790.69 = 66,102.51/x
  3. Step 3: Cross multiply
    108,543.98x = 149,790.69 × 66,102.51
  4. Step 4: Simplify right side
    108,543.98x = 9,901,540,583.63
  5. Step 5: Solve for x
    x = 9,901,540,583.63/108,543.98
  6. Step 6: Final answer
    x = 91,221.46

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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.