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Finding the Fourth Proportional to 218,615.51, 328,018.56 and 76,562.69

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Solution

The fourth proportional to 218,615.51, 328,018.56 and 76,562.69 is: 114,877.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,615.51 : 328,018.56 = 76,562.69 : x
  2. Step 2: Convert to fraction form
    218,615.51/328,018.56 = 76,562.69/x
  3. Step 3: Cross multiply
    218,615.51x = 328,018.56 × 76,562.69
  4. Step 4: Simplify right side
    218,615.51x = 25,113,983,323.53
  5. Step 5: Solve for x
    x = 25,113,983,323.53/218,615.51
  6. Step 6: Final answer
    x = 114,877.41

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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.