Home / 115,923.96-159,898.86-90,729.72

Finding the Fourth Proportional to 115,923.96, 159,898.86 and 90,729.72

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Solution

The fourth proportional to 115,923.96, 159,898.86 and 90,729.72 is: 125,147.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,923.96 : 159,898.86 = 90,729.72 : x
  2. Step 2: Convert to fraction form
    115,923.96/159,898.86 = 90,729.72/x
  3. Step 3: Cross multiply
    115,923.96x = 159,898.86 × 90,729.72
  4. Step 4: Simplify right side
    115,923.96x = 14,507,578,796.12
  5. Step 5: Solve for x
    x = 14,507,578,796.12/115,923.96
  6. Step 6: Final answer
    x = 125,147.37

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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.