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Finding the Fourth Proportional to 79,769,611.80, 119,570,436.90 and 31,228,709.40

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Solution

The fourth proportional to 79,769,611.80, 119,570,436.90 and 31,228,709.40 is: 46,810,186.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,769,611.80 : 119,570,436.90 = 31,228,709.40 : x
  2. Step 2: Convert to fraction form
    79,769,611.80/119,570,436.90 = 31,228,709.40/x
  3. Step 3: Cross multiply
    79,769,611.80x = 119,570,436.90 × 31,228,709.40
  4. Step 4: Simplify right side
    79,769,611.80x = 3,734,030,426,781,137
  5. Step 5: Solve for x
    x = 3,734,030,426,781,137/79,769,611.80
  6. Step 6: Final answer
    x = 46,810,186.77

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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.