Home / 128,660.94-177,457.23-88,381.26

Finding the Fourth Proportional to 128,660.94, 177,457.23 and 88,381.26

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Solution

The fourth proportional to 128,660.94, 177,457.23 and 88,381.26 is: 121,900.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,660.94 : 177,457.23 = 88,381.26 : x
  2. Step 2: Convert to fraction form
    128,660.94/177,457.23 = 88,381.26/x
  3. Step 3: Cross multiply
    128,660.94x = 177,457.23 × 88,381.26
  4. Step 4: Simplify right side
    128,660.94x = 15,683,893,583.51
  5. Step 5: Solve for x
    x = 15,683,893,583.51/128,660.94
  6. Step 6: Final answer
    x = 121,900.97

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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.