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Finding the Fourth Proportional to 61,079.37, 91,614.71 and 18,958.45

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Solution

The fourth proportional to 61,079.37, 91,614.71 and 18,958.45 is: 28,436.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,079.37 : 91,614.71 = 18,958.45 : x
  2. Step 2: Convert to fraction form
    61,079.37/91,614.71 = 18,958.45/x
  3. Step 3: Cross multiply
    61,079.37x = 91,614.71 × 18,958.45
  4. Step 4: Simplify right side
    61,079.37x = 1,736,872,345.93
  5. Step 5: Solve for x
    x = 1,736,872,345.93/61,079.37
  6. Step 6: Final answer
    x = 28,436.32

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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.