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Finding the Fourth Proportional to 76,212.92, 105,116.04 and 66,765.08

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Solution

The fourth proportional to 76,212.92, 105,116.04 and 66,765.08 is: 92,085.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,212.92 : 105,116.04 = 66,765.08 : x
  2. Step 2: Convert to fraction form
    76,212.92/105,116.04 = 66,765.08/x
  3. Step 3: Cross multiply
    76,212.92x = 105,116.04 × 66,765.08
  4. Step 4: Simplify right side
    76,212.92x = 7,018,080,819.88
  5. Step 5: Solve for x
    x = 7,018,080,819.88/76,212.92
  6. Step 6: Final answer
    x = 92,085.18

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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.