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Finding the Fourth Proportional to 119,291.20, 178,783.20 and 91,451.20

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Solution

The fourth proportional to 119,291.20, 178,783.20 and 91,451.20 is: 137,059.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,291.20 : 178,783.20 = 91,451.20 : x
  2. Step 2: Convert to fraction form
    119,291.20/178,783.20 = 91,451.20/x
  3. Step 3: Cross multiply
    119,291.20x = 178,783.20 × 91,451.20
  4. Step 4: Simplify right side
    119,291.20x = 16,349,938,179.84
  5. Step 5: Solve for x
    x = 16,349,938,179.84/119,291.20
  6. Step 6: Final answer
    x = 137,059.05

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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.