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Finding the Fourth Proportional to 112,542.40, 168,839.20 and 65,771.20

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Solution

The fourth proportional to 112,542.40, 168,839.20 and 65,771.20 is: 98,671.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,542.40 : 168,839.20 = 65,771.20 : x
  2. Step 2: Convert to fraction form
    112,542.40/168,839.20 = 65,771.20/x
  3. Step 3: Cross multiply
    112,542.40x = 168,839.20 × 65,771.20
  4. Step 4: Simplify right side
    112,542.40x = 11,104,756,791.04
  5. Step 5: Solve for x
    x = 11,104,756,791.04/112,542.40
  6. Step 6: Final answer
    x = 98,671.76

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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.