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Finding the Fourth Proportional to 76,530.40, 114,818.28 and 36,579.28

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Solution

The fourth proportional to 76,530.40, 114,818.28 and 36,579.28 is: 54,879.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,530.40 : 114,818.28 = 36,579.28 : x
  2. Step 2: Convert to fraction form
    76,530.40/114,818.28 = 36,579.28/x
  3. Step 3: Cross multiply
    76,530.40x = 114,818.28 × 36,579.28
  4. Step 4: Simplify right side
    76,530.40x = 4,199,970,013.24
  5. Step 5: Solve for x
    x = 4,199,970,013.24/76,530.40
  6. Step 6: Final answer
    x = 54,879.76

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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.