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Finding the Fourth Proportional to 115,729.88, 173,660.38 and 45,658.40

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Solution

The fourth proportional to 115,729.88, 173,660.38 and 45,658.40 is: 68,513.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,729.88 : 173,660.38 = 45,658.40 : x
  2. Step 2: Convert to fraction form
    115,729.88/173,660.38 = 45,658.40/x
  3. Step 3: Cross multiply
    115,729.88x = 173,660.38 × 45,658.40
  4. Step 4: Simplify right side
    115,729.88x = 7,929,055,094.19
  5. Step 5: Solve for x
    x = 7,929,055,094.19/115,729.88
  6. Step 6: Final answer
    x = 68,513.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.