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Finding the Fourth Proportional to 209,952,404.80, 314,928,607.20 and 145,329,179.20

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Solution

The fourth proportional to 209,952,404.80, 314,928,607.20 and 145,329,179.20 is: 217,993,768.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,952,404.80 : 314,928,607.20 = 145,329,179.20 : x
  2. Step 2: Convert to fraction form
    209,952,404.80/314,928,607.20 = 145,329,179.20/x
  3. Step 3: Cross multiply
    209,952,404.80x = 314,928,607.20 × 145,329,179.20
  4. Step 4: Simplify right side
    209,952,404.80x = 45,768,315,990,975,208
  5. Step 5: Solve for x
    x = 45,768,315,990,975,208/209,952,404.80
  6. Step 6: Final answer
    x = 217,993,768.80

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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.