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Finding the Fourth Proportional to 108,728.52, 163,090.62 and 61,881

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Solution

The fourth proportional to 108,728.52, 163,090.62 and 61,881 is: 92,820.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,728.52 : 163,090.62 = 61,881 : x
  2. Step 2: Convert to fraction form
    108,728.52/163,090.62 = 61,881/x
  3. Step 3: Cross multiply
    108,728.52x = 163,090.62 × 61,881
  4. Step 4: Simplify right side
    108,728.52x = 10,092,210,656.22
  5. Step 5: Solve for x
    x = 10,092,210,656.22/108,728.52
  6. Step 6: Final answer
    x = 92,820.27

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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.