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Finding the Fourth Proportional to 81,104.92, 121,580.83 and 39,008.81

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Solution

The fourth proportional to 81,104.92, 121,580.83 and 39,008.81 is: 58,476.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,104.92 : 121,580.83 = 39,008.81 : x
  2. Step 2: Convert to fraction form
    81,104.92/121,580.83 = 39,008.81/x
  3. Step 3: Cross multiply
    81,104.92x = 121,580.83 × 39,008.81
  4. Step 4: Simplify right side
    81,104.92x = 4,742,723,703.54
  5. Step 5: Solve for x
    x = 4,742,723,703.54/81,104.92
  6. Step 6: Final answer
    x = 58,476.40

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1.5x scale

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.