Home / 128,427.69-177,399.63-98,581.81

Finding the Fourth Proportional to 128,427.69, 177,399.63 and 98,581.81

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Solution

The fourth proportional to 128,427.69, 177,399.63 and 98,581.81 is: 136,172.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,427.69 : 177,399.63 = 98,581.81 : x
  2. Step 2: Convert to fraction form
    128,427.69/177,399.63 = 98,581.81/x
  3. Step 3: Cross multiply
    128,427.69x = 177,399.63 × 98,581.81
  4. Step 4: Simplify right side
    128,427.69x = 17,488,376,618.73
  5. Step 5: Solve for x
    x = 17,488,376,618.73/128,427.69
  6. Step 6: Final answer
    x = 136,172.94

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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.