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Finding the Fourth Proportional to 117,009.70, 175,514.55 and 87,485.20

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Solution

The fourth proportional to 117,009.70, 175,514.55 and 87,485.20 is: 131,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,009.70 : 175,514.55 = 87,485.20 : x
  2. Step 2: Convert to fraction form
    117,009.70/175,514.55 = 87,485.20/x
  3. Step 3: Cross multiply
    117,009.70x = 175,514.55 × 87,485.20
  4. Step 4: Simplify right side
    117,009.70x = 15,354,925,509.66
  5. Step 5: Solve for x
    x = 15,354,925,509.66/117,009.70
  6. Step 6: Final answer
    x = 131,227.80

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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.