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Finding the Fourth Proportional to 82,709.70, 124,064.55 and 69,879.30

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Solution

The fourth proportional to 82,709.70, 124,064.55 and 69,879.30 is: 104,818.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,709.70 : 124,064.55 = 69,879.30 : x
  2. Step 2: Convert to fraction form
    82,709.70/124,064.55 = 69,879.30/x
  3. Step 3: Cross multiply
    82,709.70x = 124,064.55 × 69,879.30
  4. Step 4: Simplify right side
    82,709.70x = 8,669,543,908.82
  5. Step 5: Solve for x
    x = 8,669,543,908.82/82,709.70
  6. Step 6: Final answer
    x = 104,818.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.