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Finding the Fourth Proportional to 144,672.30, 199,615.41 and 87,320.97

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Solution

The fourth proportional to 144,672.30, 199,615.41 and 87,320.97 is: 120,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,672.30 : 199,615.41 = 87,320.97 : x
  2. Step 2: Convert to fraction form
    144,672.30/199,615.41 = 87,320.97/x
  3. Step 3: Cross multiply
    144,672.30x = 199,615.41 × 87,320.97
  4. Step 4: Simplify right side
    144,672.30x = 17,430,611,228.15
  5. Step 5: Solve for x
    x = 17,430,611,228.15/144,672.30
  6. Step 6: Final answer
    x = 120,483.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.