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Finding the Fourth Proportional to 113,013.60, 169,714.80 and 79,965.60

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Solution

The fourth proportional to 113,013.60, 169,714.80 and 79,965.60 is: 120,085.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,013.60 : 169,714.80 = 79,965.60 : x
  2. Step 2: Convert to fraction form
    113,013.60/169,714.80 = 79,965.60/x
  3. Step 3: Cross multiply
    113,013.60x = 169,714.80 × 79,965.60
  4. Step 4: Simplify right side
    113,013.60x = 13,571,345,810.88
  5. Step 5: Solve for x
    x = 13,571,345,810.88/113,013.60
  6. Step 6: Final answer
    x = 120,085.95

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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.