Home / 138,896.55-191,708.69-78,502.23

Finding the Fourth Proportional to 138,896.55, 191,708.69 and 78,502.23

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Solution

The fourth proportional to 138,896.55, 191,708.69 and 78,502.23 is: 108,350.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,896.55 : 191,708.69 = 78,502.23 : x
  2. Step 2: Convert to fraction form
    138,896.55/191,708.69 = 78,502.23/x
  3. Step 3: Cross multiply
    138,896.55x = 191,708.69 × 78,502.23
  4. Step 4: Simplify right side
    138,896.55x = 15,049,558,716.84
  5. Step 5: Solve for x
    x = 15,049,558,716.84/138,896.55
  6. Step 6: Final answer
    x = 108,350.85

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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.