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Finding the Fourth Proportional to 79,769,612.80, 119,570,438.40 and 31,228,710.40

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Solution

The fourth proportional to 79,769,612.80, 119,570,438.40 and 31,228,710.40 is: 46,810,188.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,769,612.80 : 119,570,438.40 = 31,228,710.40 : x
  2. Step 2: Convert to fraction form
    79,769,612.80/119,570,438.40 = 31,228,710.40/x
  3. Step 3: Cross multiply
    79,769,612.80x = 119,570,438.40 × 31,228,710.40
  4. Step 4: Simplify right side
    79,769,612.80x = 3,734,030,593,194,639.50
  5. Step 5: Solve for x
    x = 3,734,030,593,194,639.50/79,769,612.80
  6. Step 6: Final answer
    x = 46,810,188.27

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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.