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Finding the Fourth Proportional to 79,320.80, 118,981.20 and 26,724.80

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Solution

The fourth proportional to 79,320.80, 118,981.20 and 26,724.80 is: 40,087.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,320.80 : 118,981.20 = 26,724.80 : x
  2. Step 2: Convert to fraction form
    79,320.80/118,981.20 = 26,724.80/x
  3. Step 3: Cross multiply
    79,320.80x = 118,981.20 × 26,724.80
  4. Step 4: Simplify right side
    79,320.80x = 3,179,748,773.76
  5. Step 5: Solve for x
    x = 3,179,748,773.76/79,320.80
  6. Step 6: Final answer
    x = 40,087.20

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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.