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Finding the Fourth Proportional to 66,415.52, 99,593.94 and 19,019.87

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Solution

The fourth proportional to 66,415.52, 99,593.94 and 19,019.87 is: 28,521.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,415.52 : 99,593.94 = 19,019.87 : x
  2. Step 2: Convert to fraction form
    66,415.52/99,593.94 = 19,019.87/x
  3. Step 3: Cross multiply
    66,415.52x = 99,593.94 × 19,019.87
  4. Step 4: Simplify right side
    66,415.52x = 1,894,263,738.42
  5. Step 5: Solve for x
    x = 1,894,263,738.42/66,415.52
  6. Step 6: Final answer
    x = 28,521.40

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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.