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Finding the Fourth Proportional to 218,723.88, 328,289.92 and 112,187.82

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Solution

The fourth proportional to 218,723.88, 328,289.92 and 112,187.82 is: 168,386.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,723.88 : 328,289.92 = 112,187.82 : x
  2. Step 2: Convert to fraction form
    218,723.88/328,289.92 = 112,187.82/x
  3. Step 3: Cross multiply
    218,723.88x = 328,289.92 × 112,187.82
  4. Step 4: Simplify right side
    218,723.88x = 36,830,130,452.77
  5. Step 5: Solve for x
    x = 36,830,130,452.77/218,723.88
  6. Step 6: Final answer
    x = 168,386.42

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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.