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Finding the Fourth Proportional to 39,779.01, 59,645.43 and 21,068.01

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Solution

The fourth proportional to 39,779.01, 59,645.43 and 21,068.01 is: 31,589.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,779.01 : 59,645.43 = 21,068.01 : x
  2. Step 2: Convert to fraction form
    39,779.01/59,645.43 = 21,068.01/x
  3. Step 3: Cross multiply
    39,779.01x = 59,645.43 × 21,068.01
  4. Step 4: Simplify right side
    39,779.01x = 1,256,610,515.69
  5. Step 5: Solve for x
    x = 1,256,610,515.69/39,779.01
  6. Step 6: Final answer
    x = 31,589.79

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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.