Home / 129,106,118.40-178,086,840.48-78,846,758.88

Finding the Fourth Proportional to 129,106,118.40, 178,086,840.48 and 78,846,758.88

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Solution

The fourth proportional to 129,106,118.40, 178,086,840.48 and 78,846,758.88 is: 108,759,912.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,106,118.40 : 178,086,840.48 = 78,846,758.88 : x
  2. Step 2: Convert to fraction form
    129,106,118.40/178,086,840.48 = 78,846,758.88/x
  3. Step 3: Cross multiply
    129,106,118.40x = 178,086,840.48 × 78,846,758.88
  4. Step 4: Simplify right side
    129,106,118.40x = 14,041,570,171,027,582
  5. Step 5: Solve for x
    x = 14,041,570,171,027,582/129,106,118.40
  6. Step 6: Final answer
    x = 108,759,912.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.