Home / 81,331.02-121,973.04-28,020.81

Finding the Fourth Proportional to 81,331.02, 121,973.04 and 28,020.81

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Solution

The fourth proportional to 81,331.02, 121,973.04 and 28,020.81 is: 42,023.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,331.02 : 121,973.04 = 28,020.81 : x
  2. Step 2: Convert to fraction form
    81,331.02/121,973.04 = 28,020.81/x
  3. Step 3: Cross multiply
    81,331.02x = 121,973.04 × 28,020.81
  4. Step 4: Simplify right side
    81,331.02x = 3,417,783,378.96
  5. Step 5: Solve for x
    x = 3,417,783,378.96/81,331.02
  6. Step 6: Final answer
    x = 42,023.12

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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.