Home / 128,707.40-177,608.94-75,001.16

Finding the Fourth Proportional to 128,707.40, 177,608.94 and 75,001.16

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Solution

The fourth proportional to 128,707.40, 177,608.94 and 75,001.16 is: 103,497.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,707.40 : 177,608.94 = 75,001.16 : x
  2. Step 2: Convert to fraction form
    128,707.40/177,608.94 = 75,001.16/x
  3. Step 3: Cross multiply
    128,707.40x = 177,608.94 × 75,001.16
  4. Step 4: Simplify right side
    128,707.40x = 13,320,875,638.33
  5. Step 5: Solve for x
    x = 13,320,875,638.33/128,707.40
  6. Step 6: Final answer
    x = 103,497.36

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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.