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Finding the Fourth Proportional to 121,087.86, 181,622.58 and 53,640.78

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Solution

The fourth proportional to 121,087.86, 181,622.58 and 53,640.78 is: 80,457.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,087.86 : 181,622.58 = 53,640.78 : x
  2. Step 2: Convert to fraction form
    121,087.86/181,622.58 = 53,640.78/x
  3. Step 3: Cross multiply
    121,087.86x = 181,622.58 × 53,640.78
  4. Step 4: Simplify right side
    121,087.86x = 9,742,376,856.81
  5. Step 5: Solve for x
    x = 9,742,376,856.81/121,087.86
  6. Step 6: Final answer
    x = 80,457.09

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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.