Home / 78,383.57-117,538.25-30,374.64

Finding the Fourth Proportional to 78,383.57, 117,538.25 and 30,374.64

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Solution

The fourth proportional to 78,383.57, 117,538.25 and 30,374.64 is: 45,547.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,383.57 : 117,538.25 = 30,374.64 : x
  2. Step 2: Convert to fraction form
    78,383.57/117,538.25 = 30,374.64/x
  3. Step 3: Cross multiply
    78,383.57x = 117,538.25 × 30,374.64
  4. Step 4: Simplify right side
    78,383.57x = 3,570,182,105.92
  5. Step 5: Solve for x
    x = 3,570,182,105.92/78,383.57
  6. Step 6: Final answer
    x = 45,547.58

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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.