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Finding the Fourth Proportional to 164,812.20, 247,226.40 and 86,080.20

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Solution

The fourth proportional to 164,812.20, 247,226.40 and 86,080.20 is: 129,124.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,812.20 : 247,226.40 = 86,080.20 : x
  2. Step 2: Convert to fraction form
    164,812.20/247,226.40 = 86,080.20/x
  3. Step 3: Cross multiply
    164,812.20x = 247,226.40 × 86,080.20
  4. Step 4: Simplify right side
    164,812.20x = 21,281,297,957.28
  5. Step 5: Solve for x
    x = 21,281,297,957.28/164,812.20
  6. Step 6: Final answer
    x = 129,124.53

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1.5x scale

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.