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Finding the Fourth Proportional to 63,123.93, 94,694.94 and 20,990.16

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Solution

The fourth proportional to 63,123.93, 94,694.94 and 20,990.16 is: 31,488.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,123.93 : 94,694.94 = 20,990.16 : x
  2. Step 2: Convert to fraction form
    63,123.93/94,694.94 = 20,990.16/x
  3. Step 3: Cross multiply
    63,123.93x = 94,694.94 × 20,990.16
  4. Step 4: Simplify right side
    63,123.93x = 1,987,661,941.79
  5. Step 5: Solve for x
    x = 1,987,661,941.79/63,123.93
  6. Step 6: Final answer
    x = 31,488.25

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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.