Home / 78,164.12-117,245.16-18,999.62

Finding the Fourth Proportional to 78,164.12, 117,245.16 and 18,999.62

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Solution

The fourth proportional to 78,164.12, 117,245.16 and 18,999.62 is: 28,499.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,164.12 : 117,245.16 = 18,999.62 : x
  2. Step 2: Convert to fraction form
    78,164.12/117,245.16 = 18,999.62/x
  3. Step 3: Cross multiply
    78,164.12x = 117,245.16 × 18,999.62
  4. Step 4: Simplify right side
    78,164.12x = 2,227,613,486.84
  5. Step 5: Solve for x
    x = 2,227,613,486.84/78,164.12
  6. Step 6: Final answer
    x = 28,499.18

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Double scale
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Similar ratio
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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.