Home / 72,619.90-100,224.87-40,788.80

Finding the Fourth Proportional to 72,619.90, 100,224.87 and 40,788.80

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Solution

The fourth proportional to 72,619.90, 100,224.87 and 40,788.80 is: 56,293.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,619.90 : 100,224.87 = 40,788.80 : x
  2. Step 2: Convert to fraction form
    72,619.90/100,224.87 = 40,788.80/x
  3. Step 3: Cross multiply
    72,619.90x = 100,224.87 × 40,788.80
  4. Step 4: Simplify right side
    72,619.90x = 4,088,051,973.51
  5. Step 5: Solve for x
    x = 4,088,051,973.51/72,619.90
  6. Step 6: Final answer
    x = 56,293.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.