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Finding the Fourth Proportional to 63,710.90, 95,578.38 and 21,018.77

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Solution

The fourth proportional to 63,710.90, 95,578.38 and 21,018.77 is: 31,532.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,710.90 : 95,578.38 = 21,018.77 : x
  2. Step 2: Convert to fraction form
    63,710.90/95,578.38 = 21,018.77/x
  3. Step 3: Cross multiply
    63,710.90x = 95,578.38 × 21,018.77
  4. Step 4: Simplify right side
    63,710.90x = 2,008,939,986.19
  5. Step 5: Solve for x
    x = 2,008,939,986.19/63,710.90
  6. Step 6: Final answer
    x = 31,532.12

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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.