Home / 81,014.40-121,327.20-39,412.80

Finding the Fourth Proportional to 81,014.40, 121,327.20 and 39,412.80

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Solution

The fourth proportional to 81,014.40, 121,327.20 and 39,412.80 is: 59,024.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.40 : 121,327.20 = 39,412.80 : x
  2. Step 2: Convert to fraction form
    81,014.40/121,327.20 = 39,412.80/x
  3. Step 3: Cross multiply
    81,014.40x = 121,327.20 × 39,412.80
  4. Step 4: Simplify right side
    81,014.40x = 4,781,844,668.16
  5. Step 5: Solve for x
    x = 4,781,844,668.16/81,014.40
  6. Step 6: Final answer
    x = 59,024.63

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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.