Home / 91,511.76-126,280.37-51,218.72

Finding the Fourth Proportional to 91,511.76, 126,280.37 and 51,218.72

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Solution

The fourth proportional to 91,511.76, 126,280.37 and 51,218.72 is: 70,678.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,511.76 : 126,280.37 = 51,218.72 : x
  2. Step 2: Convert to fraction form
    91,511.76/126,280.37 = 51,218.72/x
  3. Step 3: Cross multiply
    91,511.76x = 126,280.37 × 51,218.72
  4. Step 4: Simplify right side
    91,511.76x = 6,467,918,025.03
  5. Step 5: Solve for x
    x = 6,467,918,025.03/91,511.76
  6. Step 6: Final answer
    x = 70,678.54

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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.