Home / 128,935.16-177,871.92-83,624.56

Finding the Fourth Proportional to 128,935.16, 177,871.92 and 83,624.56

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Solution

The fourth proportional to 128,935.16, 177,871.92 and 83,624.56 is: 115,363.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935.16 : 177,871.92 = 83,624.56 : x
  2. Step 2: Convert to fraction form
    128,935.16/177,871.92 = 83,624.56/x
  3. Step 3: Cross multiply
    128,935.16x = 177,871.92 × 83,624.56
  4. Step 4: Simplify right side
    128,935.16x = 14,874,461,046.36
  5. Step 5: Solve for x
    x = 14,874,461,046.36/128,935.16
  6. Step 6: Final answer
    x = 115,363.89

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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.