Home / 78,627.60-117,664.38-64,416.96

Finding the Fourth Proportional to 78,627.60, 117,664.38 and 64,416.96

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Solution

The fourth proportional to 78,627.60, 117,664.38 and 64,416.96 is: 96,398.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,627.60 : 117,664.38 = 64,416.96 : x
  2. Step 2: Convert to fraction form
    78,627.60/117,664.38 = 64,416.96/x
  3. Step 3: Cross multiply
    78,627.60x = 117,664.38 × 64,416.96
  4. Step 4: Simplify right side
    78,627.60x = 7,579,581,659.88
  5. Step 5: Solve for x
    x = 7,579,581,659.88/78,627.60
  6. Step 6: Final answer
    x = 96,398.49

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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.