Home / 128,934.98-192,520.08-115,521.38

Finding the Fourth Proportional to 128,934.98, 192,520.08 and 115,521.38

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Solution

The fourth proportional to 128,934.98, 192,520.08 and 115,521.38 is: 172,491.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,934.98 : 192,520.08 = 115,521.38 : x
  2. Step 2: Convert to fraction form
    128,934.98/192,520.08 = 115,521.38/x
  3. Step 3: Cross multiply
    128,934.98x = 192,520.08 × 115,521.38
  4. Step 4: Simplify right side
    128,934.98x = 22,240,184,741.70
  5. Step 5: Solve for x
    x = 22,240,184,741.70/128,934.98
  6. Step 6: Final answer
    x = 172,491.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.