Home / 128,003.76-176,653.68-71,416.34

Finding the Fourth Proportional to 128,003.76, 176,653.68 and 71,416.34

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Solution

The fourth proportional to 128,003.76, 176,653.68 and 71,416.34 is: 98,559.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,003.76 : 176,653.68 = 71,416.34 : x
  2. Step 2: Convert to fraction form
    128,003.76/176,653.68 = 71,416.34/x
  3. Step 3: Cross multiply
    128,003.76x = 176,653.68 × 71,416.34
  4. Step 4: Simplify right side
    128,003.76x = 12,615,959,273.13
  5. Step 5: Solve for x
    x = 12,615,959,273.13/128,003.76
  6. Step 6: Final answer
    x = 98,559.29

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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.