Home / 78,231.12-117,346.30-25,640.28

Finding the Fourth Proportional to 78,231.12, 117,346.30 and 25,640.28

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Solution

The fourth proportional to 78,231.12, 117,346.30 and 25,640.28 is: 38,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,231.12 : 117,346.30 = 25,640.28 : x
  2. Step 2: Convert to fraction form
    78,231.12/117,346.30 = 25,640.28/x
  3. Step 3: Cross multiply
    78,231.12x = 117,346.30 × 25,640.28
  4. Step 4: Simplify right side
    78,231.12x = 3,008,791,988.96
  5. Step 5: Solve for x
    x = 3,008,791,988.96/78,231.12
  6. Step 6: Final answer
    x = 38,460.30

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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.