Home / 76,643.42-105,765.75-42,651.36

Finding the Fourth Proportional to 76,643.42, 105,765.75 and 42,651.36

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Solution

The fourth proportional to 76,643.42, 105,765.75 and 42,651.36 is: 58,857.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,643.42 : 105,765.75 = 42,651.36 : x
  2. Step 2: Convert to fraction form
    76,643.42/105,765.75 = 42,651.36/x
  3. Step 3: Cross multiply
    76,643.42x = 105,765.75 × 42,651.36
  4. Step 4: Simplify right side
    76,643.42x = 4,511,053,078.92
  5. Step 5: Solve for x
    x = 4,511,053,078.92/76,643.42
  6. Step 6: Final answer
    x = 58,857.67

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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.