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Finding the Fourth Proportional to 81,785,364.80, 122,573,848.80 and 43,465,236.80

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Solution

The fourth proportional to 81,785,364.80, 122,573,848.80 and 43,465,236.80 is: 65,142,478.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,785,364.80 : 122,573,848.80 = 43,465,236.80 : x
  2. Step 2: Convert to fraction form
    81,785,364.80/122,573,848.80 = 43,465,236.80/x
  3. Step 3: Cross multiply
    81,785,364.80x = 122,573,848.80 × 43,465,236.80
  4. Step 4: Simplify right side
    81,785,364.80x = 5,327,701,363,579,395
  5. Step 5: Solve for x
    x = 5,327,701,363,579,395/81,785,364.80
  6. Step 6: Final answer
    x = 65,142,478.44

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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.