Home / 129,190.64-178,281.96-72,601.88

Finding the Fourth Proportional to 129,190.64, 178,281.96 and 72,601.88

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Solution

The fourth proportional to 129,190.64, 178,281.96 and 72,601.88 is: 100,189.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,190.64 : 178,281.96 = 72,601.88 : x
  2. Step 2: Convert to fraction form
    129,190.64/178,281.96 = 72,601.88/x
  3. Step 3: Cross multiply
    129,190.64x = 178,281.96 × 72,601.88
  4. Step 4: Simplify right side
    129,190.64x = 12,943,605,466.08
  5. Step 5: Solve for x
    x = 12,943,605,466.08/129,190.64
  6. Step 6: Final answer
    x = 100,189.96

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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.