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Finding the Fourth Proportional to 108,782.90, 163,062.10 and 45,639.69

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Solution

The fourth proportional to 108,782.90, 163,062.10 and 45,639.69 is: 68,412.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,782.90 : 163,062.10 = 45,639.69 : x
  2. Step 2: Convert to fraction form
    108,782.90/163,062.10 = 45,639.69/x
  3. Step 3: Cross multiply
    108,782.90x = 163,062.10 × 45,639.69
  4. Step 4: Simplify right side
    108,782.90x = 7,442,102,883.59
  5. Step 5: Solve for x
    x = 7,442,102,883.59/108,782.90
  6. Step 6: Final answer
    x = 68,412.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.