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Finding the Fourth Proportional to 108,434.51, 149,639.59 and 60,687.85

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Solution

The fourth proportional to 108,434.51, 149,639.59 and 60,687.85 is: 83,749.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,434.51 : 149,639.59 = 60,687.85 : x
  2. Step 2: Convert to fraction form
    108,434.51/149,639.59 = 60,687.85/x
  3. Step 3: Cross multiply
    108,434.51x = 149,639.59 × 60,687.85
  4. Step 4: Simplify right side
    108,434.51x = 9,081,304,991.98
  5. Step 5: Solve for x
    x = 9,081,304,991.98/108,434.51
  6. Step 6: Final answer
    x = 83,749.21

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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.