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Finding the Fourth Proportional to 86,672.40, 130,021.20 and 36,752.40

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Solution

The fourth proportional to 86,672.40, 130,021.20 and 36,752.40 is: 55,133.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,672.40 : 130,021.20 = 36,752.40 : x
  2. Step 2: Convert to fraction form
    86,672.40/130,021.20 = 36,752.40/x
  3. Step 3: Cross multiply
    86,672.40x = 130,021.20 × 36,752.40
  4. Step 4: Simplify right side
    86,672.40x = 4,778,591,150.88
  5. Step 5: Solve for x
    x = 4,778,591,150.88/86,672.40
  6. Step 6: Final answer
    x = 55,133.94

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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.