Home / 78,927.90-118,219.05-70,172.70

Finding the Fourth Proportional to 78,927.90, 118,219.05 and 70,172.70

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Solution

The fourth proportional to 78,927.90, 118,219.05 and 70,172.70 is: 105,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,927.90 : 118,219.05 = 70,172.70 : x
  2. Step 2: Convert to fraction form
    78,927.90/118,219.05 = 70,172.70/x
  3. Step 3: Cross multiply
    78,927.90x = 118,219.05 × 70,172.70
  4. Step 4: Simplify right side
    78,927.90x = 8,295,749,929.94
  5. Step 5: Solve for x
    x = 8,295,749,929.94/78,927.90
  6. Step 6: Final answer
    x = 105,105.42

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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.