Home / 129,499.93-178,718.13-78,517.54

Finding the Fourth Proportional to 129,499.93, 178,718.13 and 78,517.54

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Solution

The fourth proportional to 129,499.93, 178,718.13 and 78,517.54 is: 108,359.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,499.93 : 178,718.13 = 78,517.54 : x
  2. Step 2: Convert to fraction form
    129,499.93/178,718.13 = 78,517.54/x
  3. Step 3: Cross multiply
    129,499.93x = 178,718.13 × 78,517.54
  4. Step 4: Simplify right side
    129,499.93x = 14,032,507,474.20
  5. Step 5: Solve for x
    x = 14,032,507,474.20/129,499.93
  6. Step 6: Final answer
    x = 108,359.19

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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.