Home / 128,719.82-177,597.35-101,411.13

Finding the Fourth Proportional to 128,719.82, 177,597.35 and 101,411.13

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Solution

The fourth proportional to 128,719.82, 177,597.35 and 101,411.13 is: 139,918.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,719.82 : 177,597.35 = 101,411.13 : x
  2. Step 2: Convert to fraction form
    128,719.82/177,597.35 = 101,411.13/x
  3. Step 3: Cross multiply
    128,719.82x = 177,597.35 × 101,411.13
  4. Step 4: Simplify right side
    128,719.82x = 18,010,347,060.52
  5. Step 5: Solve for x
    x = 18,010,347,060.52/128,719.82
  6. Step 6: Final answer
    x = 139,918.99

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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.