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Finding the Fourth Proportional to 121,981.80, 182,886.30 and 55,453.80

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Solution

The fourth proportional to 121,981.80, 182,886.30 and 55,453.80 is: 83,141.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,981.80 : 182,886.30 = 55,453.80 : x
  2. Step 2: Convert to fraction form
    121,981.80/182,886.30 = 55,453.80/x
  3. Step 3: Cross multiply
    121,981.80x = 182,886.30 × 55,453.80
  4. Step 4: Simplify right side
    121,981.80x = 10,141,740,302.94
  5. Step 5: Solve for x
    x = 10,141,740,302.94/121,981.80
  6. Step 6: Final answer
    x = 83,141.42

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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.