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Finding the Fourth Proportional to 99,855,225.60, 149,558,889.60 and 81,939,321.60

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Solution

The fourth proportional to 99,855,225.60, 149,558,889.60 and 81,939,321.60 is: 122,725,214.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,855,225.60 : 149,558,889.60 = 81,939,321.60 : x
  2. Step 2: Convert to fraction form
    99,855,225.60/149,558,889.60 = 81,939,321.60/x
  3. Step 3: Cross multiply
    99,855,225.60x = 149,558,889.60 × 81,939,321.60
  4. Step 4: Simplify right side
    99,855,225.60x = 12,254,753,953,073,294
  5. Step 5: Solve for x
    x = 12,254,753,953,073,294/99,855,225.60
  6. Step 6: Final answer
    x = 122,725,214.22

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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.