Home / 99,776,135.40-149,664,203.10-72,353,779.80

Finding the Fourth Proportional to 99,776,135.40, 149,664,203.10 and 72,353,779.80

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Solution

The fourth proportional to 99,776,135.40, 149,664,203.10 and 72,353,779.80 is: 108,530,669.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,776,135.40 : 149,664,203.10 = 72,353,779.80 : x
  2. Step 2: Convert to fraction form
    99,776,135.40/149,664,203.10 = 72,353,779.80/x
  3. Step 3: Cross multiply
    99,776,135.40x = 149,664,203.10 × 72,353,779.80
  4. Step 4: Simplify right side
    99,776,135.40x = 10,828,770,795,039,876
  5. Step 5: Solve for x
    x = 10,828,770,795,039,876/99,776,135.40
  6. Step 6: Final answer
    x = 108,530,669.70

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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.