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Finding the Fourth Proportional to 86,907.76, 119,932.70 and 47,163.76

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Solution

The fourth proportional to 86,907.76, 119,932.70 and 47,163.76 is: 65,085.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,907.76 : 119,932.70 = 47,163.76 : x
  2. Step 2: Convert to fraction form
    86,907.76/119,932.70 = 47,163.76/x
  3. Step 3: Cross multiply
    86,907.76x = 119,932.70 × 47,163.76
  4. Step 4: Simplify right side
    86,907.76x = 5,656,477,078.95
  5. Step 5: Solve for x
    x = 5,656,477,078.95/86,907.76
  6. Step 6: Final answer
    x = 65,085.98

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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.