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Finding the Fourth Proportional to 265,901,642.60, 398,889,788.70 and 84,129,866.60

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Solution

The fourth proportional to 265,901,642.60, 398,889,788.70 and 84,129,866.60 is: 126,206,609.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,901,642.60 : 398,889,788.70 = 84,129,866.60 : x
  2. Step 2: Convert to fraction form
    265,901,642.60/398,889,788.70 = 84,129,866.60/x
  3. Step 3: Cross multiply
    265,901,642.60x = 398,889,788.70 × 84,129,866.60
  4. Step 4: Simplify right side
    265,901,642.60x = 33,558,544,711,433,184
  5. Step 5: Solve for x
    x = 33,558,544,711,433,184/265,901,642.60
  6. Step 6: Final answer
    x = 126,206,609.27

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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.