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Finding the Fourth Proportional to 113,117.80, 169,676.70 and 79,940.20

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Solution

The fourth proportional to 113,117.80, 169,676.70 and 79,940.20 is: 119,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,117.80 : 169,676.70 = 79,940.20 : x
  2. Step 2: Convert to fraction form
    113,117.80/169,676.70 = 79,940.20/x
  3. Step 3: Cross multiply
    113,117.80x = 169,676.70 × 79,940.20
  4. Step 4: Simplify right side
    113,117.80x = 13,563,989,333.34
  5. Step 5: Solve for x
    x = 13,563,989,333.34/113,117.80
  6. Step 6: Final answer
    x = 119,910.30

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1.5x scale

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.