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Finding the Fourth Proportional to 108,539.82, 149,817.47 and 66,119.31

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Solution

The fourth proportional to 108,539.82, 149,817.47 and 66,119.31 is: 91,264.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,539.82 : 149,817.47 = 66,119.31 : x
  2. Step 2: Convert to fraction form
    108,539.82/149,817.47 = 66,119.31/x
  3. Step 3: Cross multiply
    108,539.82x = 149,817.47 × 66,119.31
  4. Step 4: Simplify right side
    108,539.82x = 9,905,827,411.75
  5. Step 5: Solve for x
    x = 9,905,827,411.75/108,539.82
  6. Step 6: Final answer
    x = 91,264.45

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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.