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Finding the Fourth Proportional to 279,980.04, 420,054.84 and 100,041.90

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Solution

The fourth proportional to 279,980.04, 420,054.84 and 100,041.90 is: 150,093.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,980.04 : 420,054.84 = 100,041.90 : x
  2. Step 2: Convert to fraction form
    279,980.04/420,054.84 = 100,041.90/x
  3. Step 3: Cross multiply
    279,980.04x = 420,054.84 × 100,041.90
  4. Step 4: Simplify right side
    279,980.04x = 42,023,084,297.80
  5. Step 5: Solve for x
    x = 42,023,084,297.80/279,980.04
  6. Step 6: Final answer
    x = 150,093.14

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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.