Home / 212,639,280.40-318,958,920.60-105,143,856.40

Finding the Fourth Proportional to 212,639,280.40, 318,958,920.60 and 105,143,856.40

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Solution

The fourth proportional to 212,639,280.40, 318,958,920.60 and 105,143,856.40 is: 157,715,784.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,639,280.40 : 318,958,920.60 = 105,143,856.40 : x
  2. Step 2: Convert to fraction form
    212,639,280.40/318,958,920.60 = 105,143,856.40/x
  3. Step 3: Cross multiply
    212,639,280.40x = 318,958,920.60 × 105,143,856.40
  4. Step 4: Simplify right side
    212,639,280.40x = 33,536,570,945,065,408
  5. Step 5: Solve for x
    x = 33,536,570,945,065,408/212,639,280.40
  6. Step 6: Final answer
    x = 157,715,784.60

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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.