Home / 76,335.16-105,107.88-66,245.80

Finding the Fourth Proportional to 76,335.16, 105,107.88 and 66,245.80

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Solution

The fourth proportional to 76,335.16, 105,107.88 and 66,245.80 is: 91,215.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,335.16 : 105,107.88 = 66,245.80 : x
  2. Step 2: Convert to fraction form
    76,335.16/105,107.88 = 66,245.80/x
  3. Step 3: Cross multiply
    76,335.16x = 105,107.88 × 66,245.80
  4. Step 4: Simplify right side
    76,335.16x = 6,962,955,596.90
  5. Step 5: Solve for x
    x = 6,962,955,596.90/76,335.16
  6. Step 6: Final answer
    x = 91,215.58

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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.