Home / 128,726.20-177,632.46-72,126.64

Finding the Fourth Proportional to 128,726.20, 177,632.46 and 72,126.64

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Solution

The fourth proportional to 128,726.20, 177,632.46 and 72,126.64 is: 99,529.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,726.20 : 177,632.46 = 72,126.64 : x
  2. Step 2: Convert to fraction form
    128,726.20/177,632.46 = 72,126.64/x
  3. Step 3: Cross multiply
    128,726.20x = 177,632.46 × 72,126.64
  4. Step 4: Simplify right side
    128,726.20x = 12,812,032,494.73
  5. Step 5: Solve for x
    x = 12,812,032,494.73/128,726.20
  6. Step 6: Final answer
    x = 99,529.33

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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.