Home / 76,278.78-105,262.88-42,286.64

Finding the Fourth Proportional to 76,278.78, 105,262.88 and 42,286.64

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Solution

The fourth proportional to 76,278.78, 105,262.88 and 42,286.64 is: 58,354.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,278.78 : 105,262.88 = 42,286.64 : x
  2. Step 2: Convert to fraction form
    76,278.78/105,262.88 = 42,286.64/x
  3. Step 3: Cross multiply
    76,278.78x = 105,262.88 × 42,286.64
  4. Step 4: Simplify right side
    76,278.78x = 4,451,212,774.18
  5. Step 5: Solve for x
    x = 4,451,212,774.18/76,278.78
  6. Step 6: Final answer
    x = 58,354.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.