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Finding the Fourth Proportional to 128,192.82, 176,993.58 and 82,980.24

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Solution

The fourth proportional to 128,192.82, 176,993.58 and 82,980.24 is: 114,569.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,192.82 : 176,993.58 = 82,980.24 : x
  2. Step 2: Convert to fraction form
    128,192.82/176,993.58 = 82,980.24/x
  3. Step 3: Cross multiply
    128,192.82x = 176,993.58 × 82,980.24
  4. Step 4: Simplify right side
    128,192.82x = 14,686,969,746.86
  5. Step 5: Solve for x
    x = 14,686,969,746.86/128,192.82
  6. Step 6: Final answer
    x = 114,569.36

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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.