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Finding the Fourth Proportional to 212,887.56, 319,496.64 and 79,888.80

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Solution

The fourth proportional to 212,887.56, 319,496.64 and 79,888.80 is: 119,895.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,887.56 : 319,496.64 = 79,888.80 : x
  2. Step 2: Convert to fraction form
    212,887.56/319,496.64 = 79,888.80/x
  3. Step 3: Cross multiply
    212,887.56x = 319,496.64 × 79,888.80
  4. Step 4: Simplify right side
    212,887.56x = 25,524,203,173.63
  5. Step 5: Solve for x
    x = 25,524,203,173.63/212,887.56
  6. Step 6: Final answer
    x = 119,895.23

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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.