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Finding the Fourth Proportional to 99,804,979.60, 149,483,520.60 and 81,889,075.60

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Solution

The fourth proportional to 99,804,979.60, 149,483,520.60 and 81,889,075.60 is: 122,649,865.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,804,979.60 : 149,483,520.60 = 81,889,075.60 : x
  2. Step 2: Convert to fraction form
    99,804,979.60/149,483,520.60 = 81,889,075.60/x
  3. Step 3: Cross multiply
    99,804,979.60x = 149,483,520.60 × 81,889,075.60
  4. Step 4: Simplify right side
    99,804,979.60x = 12,241,067,319,367,556
  5. Step 5: Solve for x
    x = 12,241,067,319,367,556/99,804,979.60
  6. Step 6: Final answer
    x = 122,649,865.45

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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.