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Finding the Fourth Proportional to 81,619,477.60, 122,429,216.40 and 81,619,477.60

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Solution

The fourth proportional to 81,619,477.60, 122,429,216.40 and 81,619,477.60 is: 122,429,216.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,619,477.60 : 122,429,216.40 = 81,619,477.60 : x
  2. Step 2: Convert to fraction form
    81,619,477.60/122,429,216.40 = 81,619,477.60/x
  3. Step 3: Cross multiply
    81,619,477.60x = 122,429,216.40 × 81,619,477.60
  4. Step 4: Simplify right side
    81,619,477.60x = 9,992,608,685,545,352
  5. Step 5: Solve for x
    x = 9,992,608,685,545,352/81,619,477.60
  6. Step 6: Final answer
    x = 122,429,216.40

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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.