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Finding the Fourth Proportional to 108,434.51, 149,639.60 and 60,687.86

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Solution

The fourth proportional to 108,434.51, 149,639.60 and 60,687.86 is: 83,749.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,434.51 : 149,639.60 = 60,687.86 : x
  2. Step 2: Convert to fraction form
    108,434.51/149,639.60 = 60,687.86/x
  3. Step 3: Cross multiply
    108,434.51x = 149,639.60 × 60,687.86
  4. Step 4: Simplify right side
    108,434.51x = 9,081,306,043.62
  5. Step 5: Solve for x
    x = 9,081,306,043.62/108,434.51
  6. Step 6: Final answer
    x = 83,749.23

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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.