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Finding the Fourth Proportional to 128,894,493.60, 193,341,740.40 and 71,563,600.80

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Solution

The fourth proportional to 128,894,493.60, 193,341,740.40 and 71,563,600.80 is: 107,345,401.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,894,493.60 : 193,341,740.40 = 71,563,600.80 : x
  2. Step 2: Convert to fraction form
    128,894,493.60/193,341,740.40 = 71,563,600.80/x
  3. Step 3: Cross multiply
    128,894,493.60x = 193,341,740.40 × 71,563,600.80
  4. Step 4: Simplify right side
    128,894,493.60x = 13,836,231,127,962,832
  5. Step 5: Solve for x
    x = 13,836,231,127,962,832/128,894,493.60
  6. Step 6: Final answer
    x = 107,345,401.20

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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.