Home / 77,311.07-105,889.88-72,771.83

Finding the Fourth Proportional to 77,311.07, 105,889.88 and 72,771.83

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Solution

The fourth proportional to 77,311.07, 105,889.88 and 72,771.83 is: 99,672.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,311.07 : 105,889.88 = 72,771.83 : x
  2. Step 2: Convert to fraction form
    77,311.07/105,889.88 = 72,771.83/x
  3. Step 3: Cross multiply
    77,311.07x = 105,889.88 × 72,771.83
  4. Step 4: Simplify right side
    77,311.07x = 7,705,800,346.08
  5. Step 5: Solve for x
    x = 7,705,800,346.08/77,311.07
  6. Step 6: Final answer
    x = 99,672.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.