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Finding the Fourth Proportional to 115,514.70, 172,980.45 and 92,186.70

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Solution

The fourth proportional to 115,514.70, 172,980.45 and 92,186.70 is: 138,047.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,514.70 : 172,980.45 = 92,186.70 : x
  2. Step 2: Convert to fraction form
    115,514.70/172,980.45 = 92,186.70/x
  3. Step 3: Cross multiply
    115,514.70x = 172,980.45 × 92,186.70
  4. Step 4: Simplify right side
    115,514.70x = 15,946,496,850.02
  5. Step 5: Solve for x
    x = 15,946,496,850.02/115,514.70
  6. Step 6: Final answer
    x = 138,047.34

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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.