Home / 115,121.20-172,455.80-102,582.40

Finding the Fourth Proportional to 115,121.20, 172,455.80 and 102,582.40

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Solution

The fourth proportional to 115,121.20, 172,455.80 and 102,582.40 is: 153,672.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,121.20 : 172,455.80 = 102,582.40 : x
  2. Step 2: Convert to fraction form
    115,121.20/172,455.80 = 102,582.40/x
  3. Step 3: Cross multiply
    115,121.20x = 172,455.80 × 102,582.40
  4. Step 4: Simplify right side
    115,121.20x = 17,690,929,857.92
  5. Step 5: Solve for x
    x = 17,690,929,857.92/115,121.20
  6. Step 6: Final answer
    x = 153,672.22

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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.