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Finding the Fourth Proportional to 75,419.76, 113,129.59 and 19,259.88

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Solution

The fourth proportional to 75,419.76, 113,129.59 and 19,259.88 is: 28,889.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,419.76 : 113,129.59 = 19,259.88 : x
  2. Step 2: Convert to fraction form
    75,419.76/113,129.59 = 19,259.88/x
  3. Step 3: Cross multiply
    75,419.76x = 113,129.59 × 19,259.88
  4. Step 4: Simplify right side
    75,419.76x = 2,178,862,327.85
  5. Step 5: Solve for x
    x = 2,178,862,327.85/75,419.76
  6. Step 6: Final answer
    x = 28,889.81

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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.