Home / 78,709.28-117,999.58-36,615.60

Finding the Fourth Proportional to 78,709.28, 117,999.58 and 36,615.60

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Solution

The fourth proportional to 78,709.28, 117,999.58 and 36,615.60 is: 54,893.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,709.28 : 117,999.58 = 36,615.60 : x
  2. Step 2: Convert to fraction form
    78,709.28/117,999.58 = 36,615.60/x
  3. Step 3: Cross multiply
    78,709.28x = 117,999.58 × 36,615.60
  4. Step 4: Simplify right side
    78,709.28x = 4,320,625,421.45
  5. Step 5: Solve for x
    x = 4,320,625,421.45/78,709.28
  6. Step 6: Final answer
    x = 54,893.47

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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.