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Finding the Fourth Proportional to 199,430.70, 299,141.19 and 81,072.69

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Solution

The fourth proportional to 199,430.70, 299,141.19 and 81,072.69 is: 121,607.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,430.70 : 299,141.19 = 81,072.69 : x
  2. Step 2: Convert to fraction form
    199,430.70/299,141.19 = 81,072.69/x
  3. Step 3: Cross multiply
    199,430.70x = 299,141.19 × 81,072.69
  4. Step 4: Simplify right side
    199,430.70x = 24,252,180,963.10
  5. Step 5: Solve for x
    x = 24,252,180,963.10/199,430.70
  6. Step 6: Final answer
    x = 121,607.06

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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.