Home / 143,245.47-197,682.04-78,718.72

Finding the Fourth Proportional to 143,245.47, 197,682.04 and 78,718.72

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Solution

The fourth proportional to 143,245.47, 197,682.04 and 78,718.72 is: 108,633.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,245.47 : 197,682.04 = 78,718.72 : x
  2. Step 2: Convert to fraction form
    143,245.47/197,682.04 = 78,718.72/x
  3. Step 3: Cross multiply
    143,245.47x = 197,682.04 × 78,718.72
  4. Step 4: Simplify right side
    143,245.47x = 15,561,277,352.03
  5. Step 5: Solve for x
    x = 15,561,277,352.03/143,245.47
  6. Step 6: Final answer
    x = 108,633.64

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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.