Home / 78,747.05-118,175.93-71,218.31

Finding the Fourth Proportional to 78,747.05, 118,175.93 and 71,218.31

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Solution

The fourth proportional to 78,747.05, 118,175.93 and 71,218.31 is: 106,877.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,747.05 : 118,175.93 = 71,218.31 : x
  2. Step 2: Convert to fraction form
    78,747.05/118,175.93 = 71,218.31/x
  3. Step 3: Cross multiply
    78,747.05x = 118,175.93 × 71,218.31
  4. Step 4: Simplify right side
    78,747.05x = 8,416,289,070.31
  5. Step 5: Solve for x
    x = 8,416,289,070.31/78,747.05
  6. Step 6: Final answer
    x = 106,877.52

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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.