Home / 128,633.41-177,416.49-112,690.18

Finding the Fourth Proportional to 128,633.41, 177,416.49 and 112,690.18

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Solution

The fourth proportional to 128,633.41, 177,416.49 and 112,690.18 is: 155,426.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,633.41 : 177,416.49 = 112,690.18 : x
  2. Step 2: Convert to fraction form
    128,633.41/177,416.49 = 112,690.18/x
  3. Step 3: Cross multiply
    128,633.41x = 177,416.49 × 112,690.18
  4. Step 4: Simplify right side
    128,633.41x = 19,993,096,193.07
  5. Step 5: Solve for x
    x = 19,993,096,193.07/128,633.41
  6. Step 6: Final answer
    x = 155,426.93

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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.