Home / 138,317.04-190,879.32-80,992.08

Finding the Fourth Proportional to 138,317.04, 190,879.32 and 80,992.08

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Solution

The fourth proportional to 138,317.04, 190,879.32 and 80,992.08 is: 111,770.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,317.04 : 190,879.32 = 80,992.08 : x
  2. Step 2: Convert to fraction form
    138,317.04/190,879.32 = 80,992.08/x
  3. Step 3: Cross multiply
    138,317.04x = 190,879.32 × 80,992.08
  4. Step 4: Simplify right side
    138,317.04x = 15,459,713,155.79
  5. Step 5: Solve for x
    x = 15,459,713,155.79/138,317.04
  6. Step 6: Final answer
    x = 111,770.13

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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.