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Finding the Fourth Proportional to 63,173, 94,727.78 and 21,038.20

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Solution

The fourth proportional to 63,173, 94,727.78 and 21,038.20 is: 31,546.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,173 : 94,727.78 = 21,038.20 : x
  2. Step 2: Convert to fraction form
    63,173/94,727.78 = 21,038.20/x
  3. Step 3: Cross multiply
    63,173x = 94,727.78 × 21,038.20
  4. Step 4: Simplify right side
    63,173x = 1,992,901,981.20
  5. Step 5: Solve for x
    x = 1,992,901,981.20/63,173
  6. Step 6: Final answer
    x = 31,546.74

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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.