Home / 100,878.32-151,120.63-78,587.33

Finding the Fourth Proportional to 100,878.32, 151,120.63 and 78,587.33

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Solution

The fourth proportional to 100,878.32, 151,120.63 and 78,587.33 is: 117,727.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,878.32 : 151,120.63 = 78,587.33 : x
  2. Step 2: Convert to fraction form
    100,878.32/151,120.63 = 78,587.33/x
  3. Step 3: Cross multiply
    100,878.32x = 151,120.63 × 78,587.33
  4. Step 4: Simplify right side
    100,878.32x = 11,876,166,064.01
  5. Step 5: Solve for x
    x = 11,876,166,064.01/100,878.32
  6. Step 6: Final answer
    x = 117,727.64

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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.