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Finding the Fourth Proportional to 79,415.40, 118,928.70 and 37,813.80

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Solution

The fourth proportional to 79,415.40, 118,928.70 and 37,813.80 is: 56,628.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,415.40 : 118,928.70 = 37,813.80 : x
  2. Step 2: Convert to fraction form
    79,415.40/118,928.70 = 37,813.80/x
  3. Step 3: Cross multiply
    79,415.40x = 118,928.70 × 37,813.80
  4. Step 4: Simplify right side
    79,415.40x = 4,497,146,076.06
  5. Step 5: Solve for x
    x = 4,497,146,076.06/79,415.40
  6. Step 6: Final answer
    x = 56,628.14

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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.