Home / 128,426.82-177,219.36-71,827.26

Finding the Fourth Proportional to 128,426.82, 177,219.36 and 71,827.26

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Solution

The fourth proportional to 128,426.82, 177,219.36 and 71,827.26 is: 99,116.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,426.82 : 177,219.36 = 71,827.26 : x
  2. Step 2: Convert to fraction form
    128,426.82/177,219.36 = 71,827.26/x
  3. Step 3: Cross multiply
    128,426.82x = 177,219.36 × 71,827.26
  4. Step 4: Simplify right side
    128,426.82x = 12,729,181,047.75
  5. Step 5: Solve for x
    x = 12,729,181,047.75/128,426.82
  6. Step 6: Final answer
    x = 99,116.22

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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.