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Finding the Fourth Proportional to 72,927.97, 100,662.85 and 42,308.80

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Solution

The fourth proportional to 72,927.97, 100,662.85 and 42,308.80 is: 58,399.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,927.97 : 100,662.85 = 42,308.80 : x
  2. Step 2: Convert to fraction form
    72,927.97/100,662.85 = 42,308.80/x
  3. Step 3: Cross multiply
    72,927.97x = 100,662.85 × 42,308.80
  4. Step 4: Simplify right side
    72,927.97x = 4,258,924,388.08
  5. Step 5: Solve for x
    x = 4,258,924,388.08/72,927.97
  6. Step 6: Final answer
    x = 58,399.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.