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Finding the Fourth Proportional to 91,315.76, 126,015.74 and 55,499.08

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Solution

The fourth proportional to 91,315.76, 126,015.74 and 55,499.08 is: 76,588.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,315.76 : 126,015.74 = 55,499.08 : x
  2. Step 2: Convert to fraction form
    91,315.76/126,015.74 = 55,499.08/x
  3. Step 3: Cross multiply
    91,315.76x = 126,015.74 × 55,499.08
  4. Step 4: Simplify right side
    91,315.76x = 6,993,757,635.52
  5. Step 5: Solve for x
    x = 6,993,757,635.52/91,315.76
  6. Step 6: Final answer
    x = 76,588.73

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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.