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Finding the Fourth Proportional to 79,238.77, 118,858.32 and 20,079.05

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Solution

The fourth proportional to 79,238.77, 118,858.32 and 20,079.05 is: 30,118.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,238.77 : 118,858.32 = 20,079.05 : x
  2. Step 2: Convert to fraction form
    79,238.77/118,858.32 = 20,079.05/x
  3. Step 3: Cross multiply
    79,238.77x = 118,858.32 × 20,079.05
  4. Step 4: Simplify right side
    79,238.77x = 2,386,562,476.34
  5. Step 5: Solve for x
    x = 2,386,562,476.34/79,238.77
  6. Step 6: Final answer
    x = 30,118.62

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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.