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Finding the Fourth Proportional to 291,299.79, 436,996.79 and 86,155.25

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Solution

The fourth proportional to 291,299.79, 436,996.79 and 86,155.25 is: 129,246.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,299.79 : 436,996.79 = 86,155.25 : x
  2. Step 2: Convert to fraction form
    291,299.79/436,996.79 = 86,155.25/x
  3. Step 3: Cross multiply
    291,299.79x = 436,996.79 × 86,155.25
  4. Step 4: Simplify right side
    291,299.79x = 37,649,565,398.97
  5. Step 5: Solve for x
    x = 37,649,565,398.97/291,299.79
  6. Step 6: Final answer
    x = 129,246.80

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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.