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Finding the Fourth Proportional to 72,731.40, 100,325.80 and 44,387.88

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Solution

The fourth proportional to 72,731.40, 100,325.80 and 44,387.88 is: 61,228.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,731.40 : 100,325.80 = 44,387.88 : x
  2. Step 2: Convert to fraction form
    72,731.40/100,325.80 = 44,387.88/x
  3. Step 3: Cross multiply
    72,731.40x = 100,325.80 × 44,387.88
  4. Step 4: Simplify right side
    72,731.40x = 4,453,249,571.30
  5. Step 5: Solve for x
    x = 4,453,249,571.30/72,731.40
  6. Step 6: Final answer
    x = 61,228.71

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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.