Home / 78,564.35-117,615-51,861.08

Finding the Fourth Proportional to 78,564.35, 117,615 and 51,861.08

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Solution

The fourth proportional to 78,564.35, 117,615 and 51,861.08 is: 77,638.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,564.35 : 117,615 = 51,861.08 : x
  2. Step 2: Convert to fraction form
    78,564.35/117,615 = 51,861.08/x
  3. Step 3: Cross multiply
    78,564.35x = 117,615 × 51,861.08
  4. Step 4: Simplify right side
    78,564.35x = 6,099,640,924.20
  5. Step 5: Solve for x
    x = 6,099,640,924.20/78,564.35
  6. Step 6: Final answer
    x = 77,638.79

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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.