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Finding the Fourth Proportional to 108,355.69, 149,530.85 and 70,629.94

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Solution

The fourth proportional to 108,355.69, 149,530.85 and 70,629.94 is: 97,469.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,355.69 : 149,530.85 = 70,629.94 : x
  2. Step 2: Convert to fraction form
    108,355.69/149,530.85 = 70,629.94/x
  3. Step 3: Cross multiply
    108,355.69x = 149,530.85 × 70,629.94
  4. Step 4: Simplify right side
    108,355.69x = 10,561,354,963.65
  5. Step 5: Solve for x
    x = 10,561,354,963.65/108,355.69
  6. Step 6: Final answer
    x = 97,469.32

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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.