Home / 123,276.78-170,121.87-66,688.20

Finding the Fourth Proportional to 123,276.78, 170,121.87 and 66,688.20

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Solution

The fourth proportional to 123,276.78, 170,121.87 and 66,688.20 is: 92,029.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,276.78 : 170,121.87 = 66,688.20 : x
  2. Step 2: Convert to fraction form
    123,276.78/170,121.87 = 66,688.20/x
  3. Step 3: Cross multiply
    123,276.78x = 170,121.87 × 66,688.20
  4. Step 4: Simplify right side
    123,276.78x = 11,345,121,290.93
  5. Step 5: Solve for x
    x = 11,345,121,290.93/123,276.78
  6. Step 6: Final answer
    x = 92,029.67

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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.