Home / 128,693.12-177,597.44-77,708.16

Finding the Fourth Proportional to 128,693.12, 177,597.44 and 77,708.16

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Solution

The fourth proportional to 128,693.12, 177,597.44 and 77,708.16 is: 107,237.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,693.12 : 177,597.44 = 77,708.16 : x
  2. Step 2: Convert to fraction form
    128,693.12/177,597.44 = 77,708.16/x
  3. Step 3: Cross multiply
    128,693.12x = 177,597.44 × 77,708.16
  4. Step 4: Simplify right side
    128,693.12x = 13,800,770,283.11
  5. Step 5: Solve for x
    x = 13,800,770,283.11/128,693.12
  6. Step 6: Final answer
    x = 107,237.83

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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.