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Finding the Fourth Proportional to 120,155,909.20, 168,600,910.40 and 120,155,909.20

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Solution

The fourth proportional to 120,155,909.20, 168,600,910.40 and 120,155,909.20 is: 168,600,910.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,155,909.20 : 168,600,910.40 = 120,155,909.20 : x
  2. Step 2: Convert to fraction form
    120,155,909.20/168,600,910.40 = 120,155,909.20/x
  3. Step 3: Cross multiply
    120,155,909.20x = 168,600,910.40 × 120,155,909.20
  4. Step 4: Simplify right side
    120,155,909.20x = 20,258,395,681,059,736
  5. Step 5: Solve for x
    x = 20,258,395,681,059,736/120,155,909.20
  6. Step 6: Final answer
    x = 168,600,910.40

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1.5x scale

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.