Home / 128,928.81-177,918.94-71,564.76

Finding the Fourth Proportional to 128,928.81, 177,918.94 and 71,564.76

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Solution

The fourth proportional to 128,928.81, 177,918.94 and 71,564.76 is: 98,757.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,928.81 : 177,918.94 = 71,564.76 : x
  2. Step 2: Convert to fraction form
    128,928.81/177,918.94 = 71,564.76/x
  3. Step 3: Cross multiply
    128,928.81x = 177,918.94 × 71,564.76
  4. Step 4: Simplify right side
    128,928.81x = 12,732,726,240.55
  5. Step 5: Solve for x
    x = 12,732,726,240.55/128,928.81
  6. Step 6: Final answer
    x = 98,757.80

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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.