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Finding the Fourth Proportional to 104,406.86, 144,079.92 and 61,391.21

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Solution

The fourth proportional to 104,406.86, 144,079.92 and 61,391.21 is: 84,718.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,406.86 : 144,079.92 = 61,391.21 : x
  2. Step 2: Convert to fraction form
    104,406.86/144,079.92 = 61,391.21/x
  3. Step 3: Cross multiply
    104,406.86x = 144,079.92 × 61,391.21
  4. Step 4: Simplify right side
    104,406.86x = 8,845,239,905.10
  5. Step 5: Solve for x
    x = 8,845,239,905.10/104,406.86
  6. Step 6: Final answer
    x = 84,718.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.