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Finding the Fourth Proportional to 78,099.56, 117,149.73 and 18,935.24

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Solution

The fourth proportional to 78,099.56, 117,149.73 and 18,935.24 is: 28,402.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,099.56 : 117,149.73 = 18,935.24 : x
  2. Step 2: Convert to fraction form
    78,099.56/117,149.73 = 18,935.24/x
  3. Step 3: Cross multiply
    78,099.56x = 117,149.73 × 18,935.24
  4. Step 4: Simplify right side
    78,099.56x = 2,218,257,667.74
  5. Step 5: Solve for x
    x = 2,218,257,667.74/78,099.56
  6. Step 6: Final answer
    x = 28,402.95

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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.