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Finding the Fourth Proportional to 279,043,609.80, 418,565,414.70 and 84,953,483.40

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Solution

The fourth proportional to 279,043,609.80, 418,565,414.70 and 84,953,483.40 is: 127,430,225.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,043,609.80 : 418,565,414.70 = 84,953,483.40 : x
  2. Step 2: Convert to fraction form
    279,043,609.80/418,565,414.70 = 84,953,483.40/x
  3. Step 3: Cross multiply
    279,043,609.80x = 418,565,414.70 × 84,953,483.40
  4. Step 4: Simplify right side
    279,043,609.80x = 35,558,590,009,530,568
  5. Step 5: Solve for x
    x = 35,558,590,009,530,568/279,043,609.80
  6. Step 6: Final answer
    x = 127,430,225.10

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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.