Home / 129,314.40-178,464.24-72,722.40

Finding the Fourth Proportional to 129,314.40, 178,464.24 and 72,722.40

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Solution

The fourth proportional to 129,314.40, 178,464.24 and 72,722.40 is: 100,362.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,314.40 : 178,464.24 = 72,722.40 : x
  2. Step 2: Convert to fraction form
    129,314.40/178,464.24 = 72,722.40/x
  3. Step 3: Cross multiply
    129,314.40x = 178,464.24 × 72,722.40
  4. Step 4: Simplify right side
    129,314.40x = 12,978,347,846.98
  5. Step 5: Solve for x
    x = 12,978,347,846.98/129,314.40
  6. Step 6: Final answer
    x = 100,362.74

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1.5x scale

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.