Home / 212,177.20-318,226.92-85,810.72

Finding the Fourth Proportional to 212,177.20, 318,226.92 and 85,810.72

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Solution

The fourth proportional to 212,177.20, 318,226.92 and 85,810.72 is: 128,700.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,177.20 : 318,226.92 = 85,810.72 : x
  2. Step 2: Convert to fraction form
    212,177.20/318,226.92 = 85,810.72/x
  3. Step 3: Cross multiply
    212,177.20x = 318,226.92 × 85,810.72
  4. Step 4: Simplify right side
    212,177.20x = 27,307,281,128.58
  5. Step 5: Solve for x
    x = 27,307,281,128.58/212,177.20
  6. Step 6: Final answer
    x = 128,700.36

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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.