Home / 78,774.11-108,670.75-53,289.39

Finding the Fourth Proportional to 78,774.11, 108,670.75 and 53,289.39

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Solution

The fourth proportional to 78,774.11, 108,670.75 and 53,289.39 is: 73,513.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,774.11 : 108,670.75 = 53,289.39 : x
  2. Step 2: Convert to fraction form
    78,774.11/108,670.75 = 53,289.39/x
  3. Step 3: Cross multiply
    78,774.11x = 108,670.75 × 53,289.39
  4. Step 4: Simplify right side
    78,774.11x = 5,790,997,845.12
  5. Step 5: Solve for x
    x = 5,790,997,845.12/78,774.11
  6. Step 6: Final answer
    x = 73,513.98

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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.