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Finding the Fourth Proportional to 99,804,945.10, 149,483,468.85 and 81,889,041.10

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Solution

The fourth proportional to 99,804,945.10, 149,483,468.85 and 81,889,041.10 is: 122,649,813.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,804,945.10 : 149,483,468.85 = 81,889,041.10 : x
  2. Step 2: Convert to fraction form
    99,804,945.10/149,483,468.85 = 81,889,041.10/x
  3. Step 3: Cross multiply
    99,804,945.10x = 149,483,468.85 × 81,889,041.10
  4. Step 4: Simplify right side
    99,804,945.10x = 12,241,057,924,428,218
  5. Step 5: Solve for x
    x = 12,241,057,924,428,218/99,804,945.10
  6. Step 6: Final answer
    x = 122,649,813.72

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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.