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Finding the Fourth Proportional to 191,980.18, 288,015.14 and 65,621.39

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Solution

The fourth proportional to 191,980.18, 288,015.14 and 65,621.39 is: 98,447.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,980.18 : 288,015.14 = 65,621.39 : x
  2. Step 2: Convert to fraction form
    191,980.18/288,015.14 = 65,621.39/x
  3. Step 3: Cross multiply
    191,980.18x = 288,015.14 × 65,621.39
  4. Step 4: Simplify right side
    191,980.18x = 18,899,954,171.91
  5. Step 5: Solve for x
    x = 18,899,954,171.91/191,980.18
  6. Step 6: Final answer
    x = 98,447.43

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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.