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Finding the Fourth Proportional to 279,097.60, 418,516.80 and 121,244.80

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Solution

The fourth proportional to 279,097.60, 418,516.80 and 121,244.80 is: 181,810.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,097.60 : 418,516.80 = 121,244.80 : x
  2. Step 2: Convert to fraction form
    279,097.60/418,516.80 = 121,244.80/x
  3. Step 3: Cross multiply
    279,097.60x = 418,516.80 × 121,244.80
  4. Step 4: Simplify right side
    279,097.60x = 50,742,985,712.64
  5. Step 5: Solve for x
    x = 50,742,985,712.64/279,097.60
  6. Step 6: Final answer
    x = 181,810.90

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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.