Home / 128,610.41-177,479.96-77,625.29

Finding the Fourth Proportional to 128,610.41, 177,479.96 and 77,625.29

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Solution

The fourth proportional to 128,610.41, 177,479.96 and 77,625.29 is: 107,121.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,610.41 : 177,479.96 = 77,625.29 : x
  2. Step 2: Convert to fraction form
    128,610.41/177,479.96 = 77,625.29/x
  3. Step 3: Cross multiply
    128,610.41x = 177,479.96 × 77,625.29
  4. Step 4: Simplify right side
    128,610.41x = 13,776,932,980.89
  5. Step 5: Solve for x
    x = 13,776,932,980.89/128,610.41
  6. Step 6: Final answer
    x = 107,121.45

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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.