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Finding the Fourth Proportional to 136,703.70, 205,055.55 and 76,670.55

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Solution

The fourth proportional to 136,703.70, 205,055.55 and 76,670.55 is: 115,005.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,703.70 : 205,055.55 = 76,670.55 : x
  2. Step 2: Convert to fraction form
    136,703.70/205,055.55 = 76,670.55/x
  3. Step 3: Cross multiply
    136,703.70x = 205,055.55 × 76,670.55
  4. Step 4: Simplify right side
    136,703.70x = 15,721,721,799.05
  5. Step 5: Solve for x
    x = 15,721,721,799.05/136,703.70
  6. Step 6: Final answer
    x = 115,005.83

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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.