Home / 128,165.16-176,868.24-71,578.56

Finding the Fourth Proportional to 128,165.16, 176,868.24 and 71,578.56

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Solution

The fourth proportional to 128,165.16, 176,868.24 and 71,578.56 is: 98,778.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,165.16 : 176,868.24 = 71,578.56 : x
  2. Step 2: Convert to fraction form
    128,165.16/176,868.24 = 71,578.56/x
  3. Step 3: Cross multiply
    128,165.16x = 176,868.24 × 71,578.56
  4. Step 4: Simplify right side
    128,165.16x = 12,659,973,928.93
  5. Step 5: Solve for x
    x = 12,659,973,928.93/128,165.16
  6. Step 6: Final answer
    x = 98,778.59

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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.