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Finding the Fourth Proportional to 84,477.60, 126,716.40 and 83,165.40

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Solution

The fourth proportional to 84,477.60, 126,716.40 and 83,165.40 is: 124,748.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,477.60 : 126,716.40 = 83,165.40 : x
  2. Step 2: Convert to fraction form
    84,477.60/126,716.40 = 83,165.40/x
  3. Step 3: Cross multiply
    84,477.60x = 126,716.40 × 83,165.40
  4. Step 4: Simplify right side
    84,477.60x = 10,538,420,092.56
  5. Step 5: Solve for x
    x = 10,538,420,092.56/84,477.60
  6. Step 6: Final answer
    x = 124,748.10

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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.