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Finding the Fourth Proportional to 78,846.65, 118,228.36 and 34,421.39

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Solution

The fourth proportional to 78,846.65, 118,228.36 and 34,421.39 is: 51,613.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,846.65 : 118,228.36 = 34,421.39 : x
  2. Step 2: Convert to fraction form
    78,846.65/118,228.36 = 34,421.39/x
  3. Step 3: Cross multiply
    78,846.65x = 118,228.36 × 34,421.39
  4. Step 4: Simplify right side
    78,846.65x = 4,069,584,488.62
  5. Step 5: Solve for x
    x = 4,069,584,488.62/78,846.65
  6. Step 6: Final answer
    x = 51,613.92

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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.