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Finding the Fourth Proportional to 99,855,751.20, 149,783,626.80 and 83,731,437.60

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Solution

The fourth proportional to 99,855,751.20, 149,783,626.80 and 83,731,437.60 is: 125,597,156.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,855,751.20 : 149,783,626.80 = 83,731,437.60 : x
  2. Step 2: Convert to fraction form
    99,855,751.20/149,783,626.80 = 83,731,437.60/x
  3. Step 3: Cross multiply
    99,855,751.20x = 149,783,626.80 × 83,731,437.60
  4. Step 4: Simplify right side
    99,855,751.20x = 12,541,598,400,905,888
  5. Step 5: Solve for x
    x = 12,541,598,400,905,888/99,855,751.20
  6. Step 6: Final answer
    x = 125,597,156.40

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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.