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Finding the Fourth Proportional to 71,783.35, 107,666.81 and 19,196.93

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Solution

The fourth proportional to 71,783.35, 107,666.81 and 19,196.93 is: 28,793.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,783.35 : 107,666.81 = 19,196.93 : x
  2. Step 2: Convert to fraction form
    71,783.35/107,666.81 = 19,196.93/x
  3. Step 3: Cross multiply
    71,783.35x = 107,666.81 × 19,196.93
  4. Step 4: Simplify right side
    71,783.35x = 2,066,872,388.08
  5. Step 5: Solve for x
    x = 2,066,872,388.08/71,783.35
  6. Step 6: Final answer
    x = 28,793.20

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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.