Home / 128,632.41-177,415.11-112,689.18

Finding the Fourth Proportional to 128,632.41, 177,415.11 and 112,689.18

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Solution

The fourth proportional to 128,632.41, 177,415.11 and 112,689.18 is: 155,425.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,632.41 : 177,415.11 = 112,689.18 : x
  2. Step 2: Convert to fraction form
    128,632.41/177,415.11 = 112,689.18/x
  3. Step 3: Cross multiply
    128,632.41x = 177,415.11 × 112,689.18
  4. Step 4: Simplify right side
    128,632.41x = 19,992,763,265.51
  5. Step 5: Solve for x
    x = 19,992,763,265.51/128,632.41
  6. Step 6: Final answer
    x = 155,425.55

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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.