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Finding the Fourth Proportional to 61,101.37, 91,666.37 and 18,979.30

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Solution

The fourth proportional to 61,101.37, 91,666.37 and 18,979.30 is: 28,473.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,101.37 : 91,666.37 = 18,979.30 : x
  2. Step 2: Convert to fraction form
    61,101.37/91,666.37 = 18,979.30/x
  3. Step 3: Cross multiply
    61,101.37x = 91,666.37 × 18,979.30
  4. Step 4: Simplify right side
    61,101.37x = 1,739,763,536.14
  5. Step 5: Solve for x
    x = 1,739,763,536.14/61,101.37
  6. Step 6: Final answer
    x = 28,473.40

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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.