Home / 81,471.96-121,650.59-72,983.67

Finding the Fourth Proportional to 81,471.96, 121,650.59 and 72,983.67

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Solution

The fourth proportional to 81,471.96, 121,650.59 and 72,983.67 is: 108,976.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,471.96 : 121,650.59 = 72,983.67 : x
  2. Step 2: Convert to fraction form
    81,471.96/121,650.59 = 72,983.67/x
  3. Step 3: Cross multiply
    81,471.96x = 121,650.59 × 72,983.67
  4. Step 4: Simplify right side
    81,471.96x = 8,878,506,242.13
  5. Step 5: Solve for x
    x = 8,878,506,242.13/81,471.96
  6. Step 6: Final answer
    x = 108,976.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.