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Finding the Fourth Proportional to 84,868.80, 127,339.65 and 43,315.80

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Solution

The fourth proportional to 84,868.80, 127,339.65 and 43,315.80 is: 64,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,868.80 : 127,339.65 = 43,315.80 : x
  2. Step 2: Convert to fraction form
    84,868.80/127,339.65 = 43,315.80/x
  3. Step 3: Cross multiply
    84,868.80x = 127,339.65 × 43,315.80
  4. Step 4: Simplify right side
    84,868.80x = 5,515,818,811.47
  5. Step 5: Solve for x
    x = 5,515,818,811.47/84,868.80
  6. Step 6: Final answer
    x = 64,992.30

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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.