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Finding the Fourth Proportional to 120,155,975.20, 168,601,002.80 and 120,155,975.20

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Solution

The fourth proportional to 120,155,975.20, 168,601,002.80 and 120,155,975.20 is: 168,601,002.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,155,975.20 : 168,601,002.80 = 120,155,975.20 : x
  2. Step 2: Convert to fraction form
    120,155,975.20/168,601,002.80 = 120,155,975.20/x
  3. Step 3: Cross multiply
    120,155,975.20x = 168,601,002.80 × 120,155,975.20
  4. Step 4: Simplify right side
    120,155,975.20x = 20,258,417,911,131,932
  5. Step 5: Solve for x
    x = 20,258,417,911,131,932/120,155,975.20
  6. Step 6: Final answer
    x = 168,601,002.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.