Home / 78,920.25-118,380.16-65,013.36

Finding the Fourth Proportional to 78,920.25, 118,380.16 and 65,013.36

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Solution

The fourth proportional to 78,920.25, 118,380.16 and 65,013.36 is: 97,519.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,920.25 : 118,380.16 = 65,013.36 : x
  2. Step 2: Convert to fraction form
    78,920.25/118,380.16 = 65,013.36/x
  3. Step 3: Cross multiply
    78,920.25x = 118,380.16 × 65,013.36
  4. Step 4: Simplify right side
    78,920.25x = 7,696,291,958.94
  5. Step 5: Solve for x
    x = 7,696,291,958.94/78,920.25
  6. Step 6: Final answer
    x = 97,519.86

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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.