Home / 212,986.40-318,865.20-130,042.40

Finding the Fourth Proportional to 212,986.40, 318,865.20 and 130,042.40

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Solution

The fourth proportional to 212,986.40, 318,865.20 and 130,042.40 is: 194,688.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,986.40 : 318,865.20 = 130,042.40 : x
  2. Step 2: Convert to fraction form
    212,986.40/318,865.20 = 130,042.40/x
  3. Step 3: Cross multiply
    212,986.40x = 318,865.20 × 130,042.40
  4. Step 4: Simplify right side
    212,986.40x = 41,465,995,884.48
  5. Step 5: Solve for x
    x = 41,465,995,884.48/212,986.40
  6. Step 6: Final answer
    x = 194,688.47

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1.5x scale

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.