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Finding the Fourth Proportional to 82,709.70, 124,064.55 and 74,415.30

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Solution

The fourth proportional to 82,709.70, 124,064.55 and 74,415.30 is: 111,622.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,709.70 : 124,064.55 = 74,415.30 : x
  2. Step 2: Convert to fraction form
    82,709.70/124,064.55 = 74,415.30/x
  3. Step 3: Cross multiply
    82,709.70x = 124,064.55 × 74,415.30
  4. Step 4: Simplify right side
    82,709.70x = 9,232,300,707.62
  5. Step 5: Solve for x
    x = 9,232,300,707.62/82,709.70
  6. Step 6: Final answer
    x = 111,622.95

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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.