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Finding the Fourth Proportional to 212,003.06, 317,479.71 and 155,709.68

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Solution

The fourth proportional to 212,003.06, 317,479.71 and 155,709.68 is: 233,179.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,003.06 : 317,479.71 = 155,709.68 : x
  2. Step 2: Convert to fraction form
    212,003.06/317,479.71 = 155,709.68/x
  3. Step 3: Cross multiply
    212,003.06x = 317,479.71 × 155,709.68
  4. Step 4: Simplify right side
    212,003.06x = 49,434,664,050.59
  5. Step 5: Solve for x
    x = 49,434,664,050.59/212,003.06
  6. Step 6: Final answer
    x = 233,179.01

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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.