Home / 128,426.69-177,398.25-98,580.81

Finding the Fourth Proportional to 128,426.69, 177,398.25 and 98,580.81

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Solution

The fourth proportional to 128,426.69, 177,398.25 and 98,580.81 is: 136,171.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,426.69 : 177,398.25 = 98,580.81 : x
  2. Step 2: Convert to fraction form
    128,426.69/177,398.25 = 98,580.81/x
  3. Step 3: Cross multiply
    128,426.69x = 177,398.25 × 98,580.81
  4. Step 4: Simplify right side
    128,426.69x = 17,488,063,177.58
  5. Step 5: Solve for x
    x = 17,488,063,177.58/128,426.69
  6. Step 6: Final answer
    x = 136,171.57

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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.