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Finding the Fourth Proportional to 136,918.79, 205,401.54 and 61,044.86

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Solution

The fourth proportional to 136,918.79, 205,401.54 and 61,044.86 is: 91,577.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,918.79 : 205,401.54 = 61,044.86 : x
  2. Step 2: Convert to fraction form
    136,918.79/205,401.54 = 61,044.86/x
  3. Step 3: Cross multiply
    136,918.79x = 205,401.54 × 61,044.86
  4. Step 4: Simplify right side
    136,918.79x = 12,538,706,920.85
  5. Step 5: Solve for x
    x = 12,538,706,920.85/136,918.79
  6. Step 6: Final answer
    x = 91,577.70

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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.