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Finding the Fourth Proportional to 218,704.37, 301,818.43 and 128,051.86

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Solution

The fourth proportional to 218,704.37, 301,818.43 and 128,051.86 is: 176,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,704.37 : 301,818.43 = 128,051.86 : x
  2. Step 2: Convert to fraction form
    218,704.37/301,818.43 = 128,051.86/x
  3. Step 3: Cross multiply
    218,704.37x = 301,818.43 × 128,051.86
  4. Step 4: Simplify right side
    218,704.37x = 38,648,409,834.69
  5. Step 5: Solve for x
    x = 38,648,409,834.69/218,704.37
  6. Step 6: Final answer
    x = 176,715.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.