Home / 128,707.83-177,609.55-75,001.59

Finding the Fourth Proportional to 128,707.83, 177,609.55 and 75,001.59

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Solution

The fourth proportional to 128,707.83, 177,609.55 and 75,001.59 is: 103,497.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,707.83 : 177,609.55 = 75,001.59 : x
  2. Step 2: Convert to fraction form
    128,707.83/177,609.55 = 75,001.59/x
  3. Step 3: Cross multiply
    128,707.83x = 177,609.55 × 75,001.59
  4. Step 4: Simplify right side
    128,707.83x = 13,320,998,649.18
  5. Step 5: Solve for x
    x = 13,320,998,649.18/128,707.83
  6. Step 6: Final answer
    x = 103,497.97

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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.