Home / 78,920,006.80-118,380,010.20-72,873,389.20

Finding the Fourth Proportional to 78,920,006.80, 118,380,010.20 and 72,873,389.20

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Solution

The fourth proportional to 78,920,006.80, 118,380,010.20 and 72,873,389.20 is: 109,310,083.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,920,006.80 : 118,380,010.20 = 72,873,389.20 : x
  2. Step 2: Convert to fraction form
    78,920,006.80/118,380,010.20 = 72,873,389.20/x
  3. Step 3: Cross multiply
    78,920,006.80x = 118,380,010.20 × 72,873,389.20
  4. Step 4: Simplify right side
    78,920,006.80x = 8,626,752,556,804,570
  5. Step 5: Solve for x
    x = 8,626,752,556,804,570/78,920,006.80
  6. Step 6: Final answer
    x = 109,310,083.80

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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.