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Finding the Fourth Proportional to 78,764.55, 118,164.45 and 28,843.65

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Solution

The fourth proportional to 78,764.55, 118,164.45 and 28,843.65 is: 43,271.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,764.55 : 118,164.45 = 28,843.65 : x
  2. Step 2: Convert to fraction form
    78,764.55/118,164.45 = 28,843.65/x
  3. Step 3: Cross multiply
    78,764.55x = 118,164.45 × 28,843.65
  4. Step 4: Simplify right side
    78,764.55x = 3,408,294,038.24
  5. Step 5: Solve for x
    x = 3,408,294,038.24/78,764.55
  6. Step 6: Final answer
    x = 43,271.93

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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.