Home / 115,157.94-172,704.10-72,974.36

Finding the Fourth Proportional to 115,157.94, 172,704.10 and 72,974.36

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Solution

The fourth proportional to 115,157.94, 172,704.10 and 72,974.36 is: 109,440.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,157.94 : 172,704.10 = 72,974.36 : x
  2. Step 2: Convert to fraction form
    115,157.94/172,704.10 = 72,974.36/x
  3. Step 3: Cross multiply
    115,157.94x = 172,704.10 × 72,974.36
  4. Step 4: Simplify right side
    115,157.94x = 12,602,971,166.88
  5. Step 5: Solve for x
    x = 12,602,971,166.88/115,157.94
  6. Step 6: Final answer
    x = 109,440.75

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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.