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Finding the Fourth Proportional to 90,825,879.71, 136,238,819.58 and 90,825,879.71

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Solution

The fourth proportional to 90,825,879.71, 136,238,819.58 and 90,825,879.71 is: 136,238,819.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,825,879.71 : 136,238,819.58 = 90,825,879.71 : x
  2. Step 2: Convert to fraction form
    90,825,879.71/136,238,819.58 = 90,825,879.71/x
  3. Step 3: Cross multiply
    90,825,879.71x = 136,238,819.58 × 90,825,879.71
  4. Step 4: Simplify right side
    90,825,879.71x = 12,374,010,639,346,072
  5. Step 5: Solve for x
    x = 12,374,010,639,346,072/90,825,879.71
  6. Step 6: Final answer
    x = 136,238,819.58

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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.