Home / 81,045.02-121,557.96-21,885.30

Finding the Fourth Proportional to 81,045.02, 121,557.96 and 21,885.30

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Solution

The fourth proportional to 81,045.02, 121,557.96 and 21,885.30 is: 32,825.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,045.02 : 121,557.96 = 21,885.30 : x
  2. Step 2: Convert to fraction form
    81,045.02/121,557.96 = 21,885.30/x
  3. Step 3: Cross multiply
    81,045.02x = 121,557.96 × 21,885.30
  4. Step 4: Simplify right side
    81,045.02x = 2,660,332,421.99
  5. Step 5: Solve for x
    x = 2,660,332,421.99/81,045.02
  6. Step 6: Final answer
    x = 32,825.36

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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.