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Finding the Fourth Proportional to 108,477.98, 149,681.80 and 68,163.20

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Solution

The fourth proportional to 108,477.98, 149,681.80 and 68,163.20 is: 94,054.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,477.98 : 149,681.80 = 68,163.20 : x
  2. Step 2: Convert to fraction form
    108,477.98/149,681.80 = 68,163.20/x
  3. Step 3: Cross multiply
    108,477.98x = 149,681.80 × 68,163.20
  4. Step 4: Simplify right side
    108,477.98x = 10,202,790,469.76
  5. Step 5: Solve for x
    x = 10,202,790,469.76/108,477.98
  6. Step 6: Final answer
    x = 94,054.02

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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.