Home / 91,509.32-126,285-51,222.08

Finding the Fourth Proportional to 91,509.32, 126,285 and 51,222.08

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Solution

The fourth proportional to 91,509.32, 126,285 and 51,222.08 is: 70,687.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,509.32 : 126,285 = 51,222.08 : x
  2. Step 2: Convert to fraction form
    91,509.32/126,285 = 51,222.08/x
  3. Step 3: Cross multiply
    91,509.32x = 126,285 × 51,222.08
  4. Step 4: Simplify right side
    91,509.32x = 6,468,580,372.80
  5. Step 5: Solve for x
    x = 6,468,580,372.80/91,509.32
  6. Step 6: Final answer
    x = 70,687.67

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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.