Home / 212,860.83-318,929.94-128,443.61

Finding the Fourth Proportional to 212,860.83, 318,929.94 and 128,443.61

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Solution

The fourth proportional to 212,860.83, 318,929.94 and 128,443.61 is: 192,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,860.83 : 318,929.94 = 128,443.61 : x
  2. Step 2: Convert to fraction form
    212,860.83/318,929.94 = 128,443.61/x
  3. Step 3: Cross multiply
    212,860.83x = 318,929.94 × 128,443.61
  4. Step 4: Simplify right side
    212,860.83x = 40,964,513,628.01
  5. Step 5: Solve for x
    x = 40,964,513,628.01/212,860.83
  6. Step 6: Final answer
    x = 192,447.40

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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.