Home / 212,868.70-318,941.71-128,451.49

Finding the Fourth Proportional to 212,868.70, 318,941.71 and 128,451.49

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Solution

The fourth proportional to 212,868.70, 318,941.71 and 128,451.49 is: 192,459.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,868.70 : 318,941.71 = 128,451.49 : x
  2. Step 2: Convert to fraction form
    212,868.70/318,941.71 = 128,451.49/x
  3. Step 3: Cross multiply
    212,868.70x = 318,941.71 × 128,451.49
  4. Step 4: Simplify right side
    212,868.70x = 40,968,536,277.94
  5. Step 5: Solve for x
    x = 40,968,536,277.94/212,868.70
  6. Step 6: Final answer
    x = 192,459.19

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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.