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Finding the Fourth Proportional to 108,788.90, 163,071.08 and 45,645.70

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Solution

The fourth proportional to 108,788.90, 163,071.08 and 45,645.70 is: 68,421.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,788.90 : 163,071.08 = 45,645.70 : x
  2. Step 2: Convert to fraction form
    108,788.90/163,071.08 = 45,645.70/x
  3. Step 3: Cross multiply
    108,788.90x = 163,071.08 × 45,645.70
  4. Step 4: Simplify right side
    108,788.90x = 7,443,493,596.36
  5. Step 5: Solve for x
    x = 7,443,493,596.36/108,788.90
  6. Step 6: Final answer
    x = 68,421.44

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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.