Home / 129,229.94-178,338.30-71,870.06

Finding the Fourth Proportional to 129,229.94, 178,338.30 and 71,870.06

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Solution

The fourth proportional to 129,229.94, 178,338.30 and 71,870.06 is: 99,181.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,229.94 : 178,338.30 = 71,870.06 : x
  2. Step 2: Convert to fraction form
    129,229.94/178,338.30 = 71,870.06/x
  3. Step 3: Cross multiply
    129,229.94x = 178,338.30 × 71,870.06
  4. Step 4: Simplify right side
    129,229.94x = 12,817,184,321.30
  5. Step 5: Solve for x
    x = 12,817,184,321.30/129,229.94
  6. Step 6: Final answer
    x = 99,181.23

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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.