Home / 83,109.40-124,664.09-20,779.90

Finding the Fourth Proportional to 83,109.40, 124,664.09 and 20,779.90

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Solution

The fourth proportional to 83,109.40, 124,664.09 and 20,779.90 is: 31,169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,109.40 : 124,664.09 = 20,779.90 : x
  2. Step 2: Convert to fraction form
    83,109.40/124,664.09 = 20,779.90/x
  3. Step 3: Cross multiply
    83,109.40x = 124,664.09 × 20,779.90
  4. Step 4: Simplify right side
    83,109.40x = 2,590,507,323.79
  5. Step 5: Solve for x
    x = 2,590,507,323.79/83,109.40
  6. Step 6: Final answer
    x = 31,169.85

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1.5x scale

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.