Home / 128,371.01-177,138.37-71,001.22

Finding the Fourth Proportional to 128,371.01, 177,138.37 and 71,001.22

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Solution

The fourth proportional to 128,371.01, 177,138.37 and 71,001.22 is: 97,974.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,371.01 : 177,138.37 = 71,001.22 : x
  2. Step 2: Convert to fraction form
    128,371.01/177,138.37 = 71,001.22/x
  3. Step 3: Cross multiply
    128,371.01x = 177,138.37 × 71,001.22
  4. Step 4: Simplify right side
    128,371.01x = 12,577,039,758.46
  5. Step 5: Solve for x
    x = 12,577,039,758.46/128,371.01
  6. Step 6: Final answer
    x = 97,974.14

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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.