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Finding the Fourth Proportional to 76,920.78, 106,109.55 and 53,059.26

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Solution

The fourth proportional to 76,920.78, 106,109.55 and 53,059.26 is: 73,193.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,920.78 : 106,109.55 = 53,059.26 : x
  2. Step 2: Convert to fraction form
    76,920.78/106,109.55 = 53,059.26/x
  3. Step 3: Cross multiply
    76,920.78x = 106,109.55 × 53,059.26
  4. Step 4: Simplify right side
    76,920.78x = 5,630,094,201.93
  5. Step 5: Solve for x
    x = 5,630,094,201.93/76,920.78
  6. Step 6: Final answer
    x = 73,193.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.