Home / 81,024.40-121,536.60-21,869.20

Finding the Fourth Proportional to 81,024.40, 121,536.60 and 21,869.20

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Solution

The fourth proportional to 81,024.40, 121,536.60 and 21,869.20 is: 32,803.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,024.40 : 121,536.60 = 21,869.20 : x
  2. Step 2: Convert to fraction form
    81,024.40/121,536.60 = 21,869.20/x
  3. Step 3: Cross multiply
    81,024.40x = 121,536.60 × 21,869.20
  4. Step 4: Simplify right side
    81,024.40x = 2,657,908,212.72
  5. Step 5: Solve for x
    x = 2,657,908,212.72/81,024.40
  6. Step 6: Final answer
    x = 32,803.80

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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.