Home / 76,643.21-105,768.99-42,653.12

Finding the Fourth Proportional to 76,643.21, 105,768.99 and 42,653.12

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Solution

The fourth proportional to 76,643.21, 105,768.99 and 42,653.12 is: 58,862.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,643.21 : 105,768.99 = 42,653.12 : x
  2. Step 2: Convert to fraction form
    76,643.21/105,768.99 = 42,653.12/x
  3. Step 3: Cross multiply
    76,643.21x = 105,768.99 × 42,653.12
  4. Step 4: Simplify right side
    76,643.21x = 4,511,376,893.90
  5. Step 5: Solve for x
    x = 4,511,376,893.90/76,643.21
  6. Step 6: Final answer
    x = 58,862.05

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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.