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Finding the Fourth Proportional to 279,043,517.80, 418,565,276.70 and 84,953,391.40

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Solution

The fourth proportional to 279,043,517.80, 418,565,276.70 and 84,953,391.40 is: 127,430,087.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,043,517.80 : 418,565,276.70 = 84,953,391.40 : x
  2. Step 2: Convert to fraction form
    279,043,517.80/418,565,276.70 = 84,953,391.40/x
  3. Step 3: Cross multiply
    279,043,517.80x = 418,565,276.70 × 84,953,391.40
  4. Step 4: Simplify right side
    279,043,517.80x = 35,558,539,777,944,400
  5. Step 5: Solve for x
    x = 35,558,539,777,944,400/279,043,517.80
  6. Step 6: Final answer
    x = 127,430,087.10

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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.