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Finding the Fourth Proportional to 218,859.76, 328,289.64 and 52,647.76

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Solution

The fourth proportional to 218,859.76, 328,289.64 and 52,647.76 is: 78,971.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,859.76 : 328,289.64 = 52,647.76 : x
  2. Step 2: Convert to fraction form
    218,859.76/328,289.64 = 52,647.76/x
  3. Step 3: Cross multiply
    218,859.76x = 328,289.64 × 52,647.76
  4. Step 4: Simplify right side
    218,859.76x = 17,283,714,177.21
  5. Step 5: Solve for x
    x = 17,283,714,177.21/218,859.76
  6. Step 6: Final answer
    x = 78,971.64

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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.