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Finding the Fourth Proportional to 136,763.40, 205,047.90 and 61,919.40

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Solution

The fourth proportional to 136,763.40, 205,047.90 and 61,919.40 is: 92,835.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,763.40 : 205,047.90 = 61,919.40 : x
  2. Step 2: Convert to fraction form
    136,763.40/205,047.90 = 61,919.40/x
  3. Step 3: Cross multiply
    136,763.40x = 205,047.90 × 61,919.40
  4. Step 4: Simplify right side
    136,763.40x = 12,696,442,939.26
  5. Step 5: Solve for x
    x = 12,696,442,939.26/136,763.40
  6. Step 6: Final answer
    x = 92,835.09

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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.