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Finding the Fourth Proportional to 76,907.52, 115,153.60 and 39,893.76

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Solution

The fourth proportional to 76,907.52, 115,153.60 and 39,893.76 is: 59,732.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,907.52 : 115,153.60 = 39,893.76 : x
  2. Step 2: Convert to fraction form
    76,907.52/115,153.60 = 39,893.76/x
  3. Step 3: Cross multiply
    76,907.52x = 115,153.60 × 39,893.76
  4. Step 4: Simplify right side
    76,907.52x = 4,593,910,081.54
  5. Step 5: Solve for x
    x = 4,593,910,081.54/76,907.52
  6. Step 6: Final answer
    x = 59,732.91

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1.5x scale

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.