Home / 81,477.46-121,658.79-72,989.17

Finding the Fourth Proportional to 81,477.46, 121,658.79 and 72,989.17

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Solution

The fourth proportional to 81,477.46, 121,658.79 and 72,989.17 is: 108,984.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,477.46 : 121,658.79 = 72,989.17 : x
  2. Step 2: Convert to fraction form
    81,477.46/121,658.79 = 72,989.17/x
  3. Step 3: Cross multiply
    81,477.46x = 121,658.79 × 72,989.17
  4. Step 4: Simplify right side
    81,477.46x = 8,879,774,105.30
  5. Step 5: Solve for x
    x = 8,879,774,105.30/81,477.46
  6. Step 6: Final answer
    x = 108,984.42

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1.5x scale

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.