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Finding the Fourth Proportional to 79,320.79, 118,984.47 and 20,158.03

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Solution

The fourth proportional to 79,320.79, 118,984.47 and 20,158.03 is: 30,237.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,320.79 : 118,984.47 = 20,158.03 : x
  2. Step 2: Convert to fraction form
    79,320.79/118,984.47 = 20,158.03/x
  3. Step 3: Cross multiply
    79,320.79x = 118,984.47 × 20,158.03
  4. Step 4: Simplify right side
    79,320.79x = 2,398,492,515.79
  5. Step 5: Solve for x
    x = 2,398,492,515.79/79,320.79
  6. Step 6: Final answer
    x = 30,237.88

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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.