Home / 128,694.12-177,598.82-77,709.16

Finding the Fourth Proportional to 128,694.12, 177,598.82 and 77,709.16

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Solution

The fourth proportional to 128,694.12, 177,598.82 and 77,709.16 is: 107,239.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,694.12 : 177,598.82 = 77,709.16 : x
  2. Step 2: Convert to fraction form
    128,694.12/177,598.82 = 77,709.16/x
  3. Step 3: Cross multiply
    128,694.12x = 177,598.82 × 77,709.16
  4. Step 4: Simplify right side
    128,694.12x = 13,801,055,119.19
  5. Step 5: Solve for x
    x = 13,801,055,119.19/128,694.12
  6. Step 6: Final answer
    x = 107,239.21

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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.