Home / 128,815.64-177,729.22-83,495.52

Finding the Fourth Proportional to 128,815.64, 177,729.22 and 83,495.52

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Solution

The fourth proportional to 128,815.64, 177,729.22 and 83,495.52 is: 115,200.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,815.64 : 177,729.22 = 83,495.52 : x
  2. Step 2: Convert to fraction form
    128,815.64/177,729.22 = 83,495.52/x
  3. Step 3: Cross multiply
    128,815.64x = 177,729.22 × 83,495.52
  4. Step 4: Simplify right side
    128,815.64x = 14,839,593,643.09
  5. Step 5: Solve for x
    x = 14,839,593,643.09/128,815.64
  6. Step 6: Final answer
    x = 115,200.25

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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.