Home / 126,379,615.20-189,569,422.80-77,699,619.60

Finding the Fourth Proportional to 126,379,615.20, 189,569,422.80 and 77,699,619.60

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Solution

The fourth proportional to 126,379,615.20, 189,569,422.80 and 77,699,619.60 is: 116,549,429.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,379,615.20 : 189,569,422.80 = 77,699,619.60 : x
  2. Step 2: Convert to fraction form
    126,379,615.20/189,569,422.80 = 77,699,619.60/x
  3. Step 3: Cross multiply
    126,379,615.20x = 189,569,422.80 × 77,699,619.60
  4. Step 4: Simplify right side
    126,379,615.20x = 14,729,472,039,351,566
  5. Step 5: Solve for x
    x = 14,729,472,039,351,566/126,379,615.20
  6. Step 6: Final answer
    x = 116,549,429.40

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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.