Home / 78,421.37-117,636.50-22,257.05

Finding the Fourth Proportional to 78,421.37, 117,636.50 and 22,257.05

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Solution

The fourth proportional to 78,421.37, 117,636.50 and 22,257.05 is: 33,386.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,421.37 : 117,636.50 = 22,257.05 : x
  2. Step 2: Convert to fraction form
    78,421.37/117,636.50 = 22,257.05/x
  3. Step 3: Cross multiply
    78,421.37x = 117,636.50 × 22,257.05
  4. Step 4: Simplify right side
    78,421.37x = 2,618,240,929.79
  5. Step 5: Solve for x
    x = 2,618,240,929.79/78,421.37
  6. Step 6: Final answer
    x = 33,386.83

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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.