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Finding the Fourth Proportional to 55,779.78, 83,669.88 and 39,213.96

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Solution

The fourth proportional to 55,779.78, 83,669.88 and 39,213.96 is: 58,821.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,779.78 : 83,669.88 = 39,213.96 : x
  2. Step 2: Convert to fraction form
    55,779.78/83,669.88 = 39,213.96/x
  3. Step 3: Cross multiply
    55,779.78x = 83,669.88 × 39,213.96
  4. Step 4: Simplify right side
    55,779.78x = 3,281,027,327.52
  5. Step 5: Solve for x
    x = 3,281,027,327.52/55,779.78
  6. Step 6: Final answer
    x = 58,821.09

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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.