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Finding the Fourth Proportional to 84,219.66, 126,420.48 and 74,919.24

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Solution

The fourth proportional to 84,219.66, 126,420.48 and 74,919.24 is: 112,459.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,219.66 : 126,420.48 = 74,919.24 : x
  2. Step 2: Convert to fraction form
    84,219.66/126,420.48 = 74,919.24/x
  3. Step 3: Cross multiply
    84,219.66x = 126,420.48 × 74,919.24
  4. Step 4: Simplify right side
    84,219.66x = 9,471,326,282.04
  5. Step 5: Solve for x
    x = 9,471,326,282.04/84,219.66
  6. Step 6: Final answer
    x = 112,459.80

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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.