Home / 212,958.81-319,222.55-138,126.45

Finding the Fourth Proportional to 212,958.81, 319,222.55 and 138,126.45

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Solution

The fourth proportional to 212,958.81, 319,222.55 and 138,126.45 is: 207,049.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,958.81 : 319,222.55 = 138,126.45 : x
  2. Step 2: Convert to fraction form
    212,958.81/319,222.55 = 138,126.45/x
  3. Step 3: Cross multiply
    212,958.81x = 319,222.55 × 138,126.45
  4. Step 4: Simplify right side
    212,958.81x = 44,093,076,900.82
  5. Step 5: Solve for x
    x = 44,093,076,900.82/212,958.81
  6. Step 6: Final answer
    x = 207,049.79

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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.