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Finding the Fourth Proportional to 175,209.60, 262,814.40 and 81,724.80

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Solution

The fourth proportional to 175,209.60, 262,814.40 and 81,724.80 is: 122,587.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    175,209.60 : 262,814.40 = 81,724.80 : x
  2. Step 2: Convert to fraction form
    175,209.60/262,814.40 = 81,724.80/x
  3. Step 3: Cross multiply
    175,209.60x = 262,814.40 × 81,724.80
  4. Step 4: Simplify right side
    175,209.60x = 21,478,454,277.12
  5. Step 5: Solve for x
    x = 21,478,454,277.12/175,209.60
  6. Step 6: Final answer
    x = 122,587.20

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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.