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Finding the Fourth Proportional to 113,820.60, 170,342.10 and 99,823.80

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Solution

The fourth proportional to 113,820.60, 170,342.10 and 99,823.80 is: 149,394.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,820.60 : 170,342.10 = 99,823.80 : x
  2. Step 2: Convert to fraction form
    113,820.60/170,342.10 = 99,823.80/x
  3. Step 3: Cross multiply
    113,820.60x = 170,342.10 × 99,823.80
  4. Step 4: Simplify right side
    113,820.60x = 17,004,195,721.98
  5. Step 5: Solve for x
    x = 17,004,195,721.98/113,820.60
  6. Step 6: Final answer
    x = 149,394.71

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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.