Home / 212,181.12-318,276.54-69,980.76

Finding the Fourth Proportional to 212,181.12, 318,276.54 and 69,980.76

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Solution

The fourth proportional to 212,181.12, 318,276.54 and 69,980.76 is: 104,972.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,181.12 : 318,276.54 = 69,980.76 : x
  2. Step 2: Convert to fraction form
    212,181.12/318,276.54 = 69,980.76/x
  3. Step 3: Cross multiply
    212,181.12x = 318,276.54 × 69,980.76
  4. Step 4: Simplify right side
    212,181.12x = 22,273,234,159.37
  5. Step 5: Solve for x
    x = 22,273,234,159.37/212,181.12
  6. Step 6: Final answer
    x = 104,972.74

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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.