Home / 128,635.40-177,460.26-77,619.69

Finding the Fourth Proportional to 128,635.40, 177,460.26 and 77,619.69

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Solution

The fourth proportional to 128,635.40, 177,460.26 and 77,619.69 is: 107,081.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,635.40 : 177,460.26 = 77,619.69 : x
  2. Step 2: Convert to fraction form
    128,635.40/177,460.26 = 77,619.69/x
  3. Step 3: Cross multiply
    128,635.40x = 177,460.26 × 77,619.69
  4. Step 4: Simplify right side
    128,635.40x = 13,774,410,368.52
  5. Step 5: Solve for x
    x = 13,774,410,368.52/128,635.40
  6. Step 6: Final answer
    x = 107,081.03

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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.