Home / 128,426.19-177,218.51-71,826.63

Finding the Fourth Proportional to 128,426.19, 177,218.51 and 71,826.63

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Solution

The fourth proportional to 128,426.19, 177,218.51 and 71,826.63 is: 99,115.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,426.19 : 177,218.51 = 71,826.63 : x
  2. Step 2: Convert to fraction form
    128,426.19/177,218.51 = 71,826.63/x
  3. Step 3: Cross multiply
    128,426.19x = 177,218.51 × 71,826.63
  4. Step 4: Simplify right side
    128,426.19x = 12,729,008,346.92
  5. Step 5: Solve for x
    x = 12,729,008,346.92/128,426.19
  6. Step 6: Final answer
    x = 99,115.36

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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.