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Finding the Fourth Proportional to 136,993.50, 205,551.81 and 87,060.65

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Solution

The fourth proportional to 136,993.50, 205,551.81 and 87,060.65 is: 130,630.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,993.50 : 205,551.81 = 87,060.65 : x
  2. Step 2: Convert to fraction form
    136,993.50/205,551.81 = 87,060.65/x
  3. Step 3: Cross multiply
    136,993.50x = 205,551.81 × 87,060.65
  4. Step 4: Simplify right side
    136,993.50x = 17,895,473,159.52
  5. Step 5: Solve for x
    x = 17,895,473,159.52/136,993.50
  6. Step 6: Final answer
    x = 130,630.09

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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.