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Finding the Fourth Proportional to 76,923.42, 115,385.13 and 21,519.42

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Solution

The fourth proportional to 76,923.42, 115,385.13 and 21,519.42 is: 32,279.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,923.42 : 115,385.13 = 21,519.42 : x
  2. Step 2: Convert to fraction form
    76,923.42/115,385.13 = 21,519.42/x
  3. Step 3: Cross multiply
    76,923.42x = 115,385.13 × 21,519.42
  4. Step 4: Simplify right side
    76,923.42x = 2,483,021,074.22
  5. Step 5: Solve for x
    x = 2,483,021,074.22/76,923.42
  6. Step 6: Final answer
    x = 32,279.13

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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.