Home / 211,423.20-317,163.60-78,271.20

Finding the Fourth Proportional to 211,423.20, 317,163.60 and 78,271.20

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Solution

The fourth proportional to 211,423.20, 317,163.60 and 78,271.20 is: 117,417.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,423.20 : 317,163.60 = 78,271.20 : x
  2. Step 2: Convert to fraction form
    211,423.20/317,163.60 = 78,271.20/x
  3. Step 3: Cross multiply
    211,423.20x = 317,163.60 × 78,271.20
  4. Step 4: Simplify right side
    211,423.20x = 24,824,775,568.32
  5. Step 5: Solve for x
    x = 24,824,775,568.32/211,423.20
  6. Step 6: Final answer
    x = 117,417.46

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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.