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Finding the Fourth Proportional to 77,167.88, 115,758.75 and 21,008.28

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Solution

The fourth proportional to 77,167.88, 115,758.75 and 21,008.28 is: 31,514.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,167.88 : 115,758.75 = 21,008.28 : x
  2. Step 2: Convert to fraction form
    77,167.88/115,758.75 = 21,008.28/x
  3. Step 3: Cross multiply
    77,167.88x = 115,758.75 × 21,008.28
  4. Step 4: Simplify right side
    77,167.88x = 2,431,892,232.45
  5. Step 5: Solve for x
    x = 2,431,892,232.45/77,167.88
  6. Step 6: Final answer
    x = 31,514.31

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1.5x scale

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.