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Finding the Fourth Proportional to 50,666.60, 75,976.80 and 21,066.77

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Solution

The fourth proportional to 50,666.60, 75,976.80 and 21,066.77 is: 31,590.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,666.60 : 75,976.80 = 21,066.77 : x
  2. Step 2: Convert to fraction form
    50,666.60/75,976.80 = 21,066.77/x
  3. Step 3: Cross multiply
    50,666.60x = 75,976.80 × 21,066.77
  4. Step 4: Simplify right side
    50,666.60x = 1,600,585,391.05
  5. Step 5: Solve for x
    x = 1,600,585,391.05/50,666.60
  6. Step 6: Final answer
    x = 31,590.55

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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.