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Finding the Fourth Proportional to 77,327.20, 115,990.80 and 21,167.20

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Solution

The fourth proportional to 77,327.20, 115,990.80 and 21,167.20 is: 31,750.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,327.20 : 115,990.80 = 21,167.20 : x
  2. Step 2: Convert to fraction form
    77,327.20/115,990.80 = 21,167.20/x
  3. Step 3: Cross multiply
    77,327.20x = 115,990.80 × 21,167.20
  4. Step 4: Simplify right side
    77,327.20x = 2,455,200,461.76
  5. Step 5: Solve for x
    x = 2,455,200,461.76/77,327.20
  6. Step 6: Final answer
    x = 31,750.80

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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.