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Finding the Fourth Proportional to 115,339.74, 159,268.97 and 72,393.67

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Solution

The fourth proportional to 115,339.74, 159,268.97 and 72,393.67 is: 99,966.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,339.74 : 159,268.97 = 72,393.67 : x
  2. Step 2: Convert to fraction form
    115,339.74/159,268.97 = 72,393.67/x
  3. Step 3: Cross multiply
    115,339.74x = 159,268.97 × 72,393.67
  4. Step 4: Simplify right side
    115,339.74x = 11,530,065,255.42
  5. Step 5: Solve for x
    x = 11,530,065,255.42/115,339.74
  6. Step 6: Final answer
    x = 99,966.11

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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.