Home / 128,135.92-176,815.80-82,815.28

Finding the Fourth Proportional to 128,135.92, 176,815.80 and 82,815.28

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Solution

The fourth proportional to 128,135.92, 176,815.80 and 82,815.28 is: 114,277.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,135.92 : 176,815.80 = 82,815.28 : x
  2. Step 2: Convert to fraction form
    128,135.92/176,815.80 = 82,815.28/x
  3. Step 3: Cross multiply
    128,135.92x = 176,815.80 × 82,815.28
  4. Step 4: Simplify right side
    128,135.92x = 14,643,049,985.42
  5. Step 5: Solve for x
    x = 14,643,049,985.42/128,135.92
  6. Step 6: Final answer
    x = 114,277.48

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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.