Home / 411,212,800.80-616,821,300-138,585,929.76

Finding the Fourth Proportional to 411,212,800.80, 616,821,300 and 138,585,929.76

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Solution

The fourth proportional to 411,212,800.80, 616,821,300 and 138,585,929.76 is: 207,879,601.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,212,800.80 : 616,821,300 = 138,585,929.76 : x
  2. Step 2: Convert to fraction form
    411,212,800.80/616,821,300 = 138,585,929.76/x
  3. Step 3: Cross multiply
    411,212,800.80x = 616,821,300 × 138,585,929.76
  4. Step 4: Simplify right side
    411,212,800.80x = 85,482,753,356,271,888
  5. Step 5: Solve for x
    x = 85,482,753,356,271,888/411,212,800.80
  6. Step 6: Final answer
    x = 207,879,601.97

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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.