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Finding the Fourth Proportional to 113,480.80, 170,221.20 and 74,114.80

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Solution

The fourth proportional to 113,480.80, 170,221.20 and 74,114.80 is: 111,172.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,480.80 : 170,221.20 = 74,114.80 : x
  2. Step 2: Convert to fraction form
    113,480.80/170,221.20 = 74,114.80/x
  3. Step 3: Cross multiply
    113,480.80x = 170,221.20 × 74,114.80
  4. Step 4: Simplify right side
    113,480.80x = 12,615,910,193.76
  5. Step 5: Solve for x
    x = 12,615,910,193.76/113,480.80
  6. Step 6: Final answer
    x = 111,172.20

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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.