Home / 128,145.40-176,921.94-82,845.16

Finding the Fourth Proportional to 128,145.40, 176,921.94 and 82,845.16

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Solution

The fourth proportional to 128,145.40, 176,921.94 and 82,845.16 is: 114,378.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.40 : 176,921.94 = 82,845.16 : x
  2. Step 2: Convert to fraction form
    128,145.40/176,921.94 = 82,845.16/x
  3. Step 3: Cross multiply
    128,145.40x = 176,921.94 × 82,845.16
  4. Step 4: Simplify right side
    128,145.40x = 14,657,126,426.81
  5. Step 5: Solve for x
    x = 14,657,126,426.81/128,145.40
  6. Step 6: Final answer
    x = 114,378.87

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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.