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Finding the Fourth Proportional to 128,804.58, 193,109.67 and 84,442.50

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Solution

The fourth proportional to 128,804.58, 193,109.67 and 84,442.50 is: 126,600.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,804.58 : 193,109.67 = 84,442.50 : x
  2. Step 2: Convert to fraction form
    128,804.58/193,109.67 = 84,442.50/x
  3. Step 3: Cross multiply
    128,804.58x = 193,109.67 × 84,442.50
  4. Step 4: Simplify right side
    128,804.58x = 16,306,663,308.98
  5. Step 5: Solve for x
    x = 16,306,663,308.98/128,804.58
  6. Step 6: Final answer
    x = 126,600.03

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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.