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Finding the Fourth Proportional to 136,920.41, 205,403.96 and 61,046.48

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Solution

The fourth proportional to 136,920.41, 205,403.96 and 61,046.48 is: 91,580.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,920.41 : 205,403.96 = 61,046.48 : x
  2. Step 2: Convert to fraction form
    136,920.41/205,403.96 = 61,046.48/x
  3. Step 3: Cross multiply
    136,920.41x = 205,403.96 × 61,046.48
  4. Step 4: Simplify right side
    136,920.41x = 12,539,187,403.81
  5. Step 5: Solve for x
    x = 12,539,187,403.81/136,920.41
  6. Step 6: Final answer
    x = 91,580.12

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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.