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Finding the Fourth Proportional to 76,907.80, 115,367.10 and 43,643.80

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Solution

The fourth proportional to 76,907.80, 115,367.10 and 43,643.80 is: 65,468.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,907.80 : 115,367.10 = 43,643.80 : x
  2. Step 2: Convert to fraction form
    76,907.80/115,367.10 = 43,643.80/x
  3. Step 3: Cross multiply
    76,907.80x = 115,367.10 × 43,643.80
  4. Step 4: Simplify right side
    76,907.80x = 5,035,058,638.98
  5. Step 5: Solve for x
    x = 5,035,058,638.98/76,907.80
  6. Step 6: Final answer
    x = 65,468.76

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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.