Home / 107,727.40-161,763.90-72,821.80

Finding the Fourth Proportional to 107,727.40, 161,763.90 and 72,821.80

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Solution

The fourth proportional to 107,727.40, 161,763.90 and 72,821.80 is: 109,349.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,727.40 : 161,763.90 = 72,821.80 : x
  2. Step 2: Convert to fraction form
    107,727.40/161,763.90 = 72,821.80/x
  3. Step 3: Cross multiply
    107,727.40x = 161,763.90 × 72,821.80
  4. Step 4: Simplify right side
    107,727.40x = 11,779,938,373.02
  5. Step 5: Solve for x
    x = 11,779,938,373.02/107,727.40
  6. Step 6: Final answer
    x = 109,349.51

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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.