Home / 128,665.29-177,552.91-71,305.45

Finding the Fourth Proportional to 128,665.29, 177,552.91 and 71,305.45

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Solution

The fourth proportional to 128,665.29, 177,552.91 and 71,305.45 is: 98,398.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,665.29 : 177,552.91 = 71,305.45 : x
  2. Step 2: Convert to fraction form
    128,665.29/177,552.91 = 71,305.45/x
  3. Step 3: Cross multiply
    128,665.29x = 177,552.91 × 71,305.45
  4. Step 4: Simplify right side
    128,665.29x = 12,660,489,791.61
  5. Step 5: Solve for x
    x = 12,660,489,791.61/128,665.29
  6. Step 6: Final answer
    x = 98,398.64

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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.