Home / 212,031.78-318,047.88-99,629.58

Finding the Fourth Proportional to 212,031.78, 318,047.88 and 99,629.58

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Solution

The fourth proportional to 212,031.78, 318,047.88 and 99,629.58 is: 149,444.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,031.78 : 318,047.88 = 99,629.58 : x
  2. Step 2: Convert to fraction form
    212,031.78/318,047.88 = 99,629.58/x
  3. Step 3: Cross multiply
    212,031.78x = 318,047.88 × 99,629.58
  4. Step 4: Simplify right side
    212,031.78x = 31,686,976,704.29
  5. Step 5: Solve for x
    x = 31,686,976,704.29/212,031.78
  6. Step 6: Final answer
    x = 149,444.47

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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.