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Finding the Fourth Proportional to 108,749.36, 163,133.76 and 42,187.88

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Solution

The fourth proportional to 108,749.36, 163,133.76 and 42,187.88 is: 63,285.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,749.36 : 163,133.76 = 42,187.88 : x
  2. Step 2: Convert to fraction form
    108,749.36/163,133.76 = 42,187.88/x
  3. Step 3: Cross multiply
    108,749.36x = 163,133.76 × 42,187.88
  4. Step 4: Simplify right side
    108,749.36x = 6,882,267,490.83
  5. Step 5: Solve for x
    x = 6,882,267,490.83/108,749.36
  6. Step 6: Final answer
    x = 63,285.59

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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.