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Finding the Fourth Proportional to 82,483,905.20, 123,725,857.80 and 81,208,446.80

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Solution

The fourth proportional to 82,483,905.20, 123,725,857.80 and 81,208,446.80 is: 121,812,670.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,483,905.20 : 123,725,857.80 = 81,208,446.80 : x
  2. Step 2: Convert to fraction form
    82,483,905.20/123,725,857.80 = 81,208,446.80/x
  3. Step 3: Cross multiply
    82,483,905.20x = 123,725,857.80 × 81,208,446.80
  4. Step 4: Simplify right side
    82,483,905.20x = 10,047,584,740,935,664
  5. Step 5: Solve for x
    x = 10,047,584,740,935,664/82,483,905.20
  6. Step 6: Final answer
    x = 121,812,670.20

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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.