Home / 81,384.47-112,349.49-54,205.75

Finding the Fourth Proportional to 81,384.47, 112,349.49 and 54,205.75

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Solution

The fourth proportional to 81,384.47, 112,349.49 and 54,205.75 is: 74,829.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,384.47 : 112,349.49 = 54,205.75 : x
  2. Step 2: Convert to fraction form
    81,384.47/112,349.49 = 54,205.75/x
  3. Step 3: Cross multiply
    81,384.47x = 112,349.49 × 54,205.75
  4. Step 4: Simplify right side
    81,384.47x = 6,089,988,367.57
  5. Step 5: Solve for x
    x = 6,089,988,367.57/81,384.47
  6. Step 6: Final answer
    x = 74,829.86

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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.