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Finding the Fourth Proportional to 71,777.44, 107,666.16 and 19,187.20

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Solution

The fourth proportional to 71,777.44, 107,666.16 and 19,187.20 is: 28,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,777.44 : 107,666.16 = 19,187.20 : x
  2. Step 2: Convert to fraction form
    71,777.44/107,666.16 = 19,187.20/x
  3. Step 3: Cross multiply
    71,777.44x = 107,666.16 × 19,187.20
  4. Step 4: Simplify right side
    71,777.44x = 2,065,812,145.15
  5. Step 5: Solve for x
    x = 2,065,812,145.15/71,777.44
  6. Step 6: Final answer
    x = 28,780.80

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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.