Home / 76,309.08-105,288.84-66,219.72

Finding the Fourth Proportional to 76,309.08, 105,288.84 and 66,219.72

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Solution

The fourth proportional to 76,309.08, 105,288.84 and 66,219.72 is: 91,367.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,309.08 : 105,288.84 = 66,219.72 : x
  2. Step 2: Convert to fraction form
    76,309.08/105,288.84 = 66,219.72/x
  3. Step 3: Cross multiply
    76,309.08x = 105,288.84 × 66,219.72
  4. Step 4: Simplify right side
    76,309.08x = 6,972,197,503.92
  5. Step 5: Solve for x
    x = 6,972,197,503.92/76,309.08
  6. Step 6: Final answer
    x = 91,367.86

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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.