Home / 212,890.26-318,973.89-128,473.04

Finding the Fourth Proportional to 212,890.26, 318,973.89 and 128,473.04

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Solution

The fourth proportional to 212,890.26, 318,973.89 and 128,473.04 is: 192,491.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,890.26 : 318,973.89 = 128,473.04 : x
  2. Step 2: Convert to fraction form
    212,890.26/318,973.89 = 128,473.04/x
  3. Step 3: Cross multiply
    212,890.26x = 318,973.89 × 128,473.04
  4. Step 4: Simplify right side
    212,890.26x = 40,979,545,328.93
  5. Step 5: Solve for x
    x = 40,979,545,328.93/212,890.26
  6. Step 6: Final answer
    x = 192,491.41

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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.