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Finding the Fourth Proportional to 84,818.64, 126,986.04 and 67,314

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Solution

The fourth proportional to 84,818.64, 126,986.04 and 67,314 is: 100,779.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,818.64 : 126,986.04 = 67,314 : x
  2. Step 2: Convert to fraction form
    84,818.64/126,986.04 = 67,314/x
  3. Step 3: Cross multiply
    84,818.64x = 126,986.04 × 67,314
  4. Step 4: Simplify right side
    84,818.64x = 8,547,938,296.56
  5. Step 5: Solve for x
    x = 8,547,938,296.56/84,818.64
  6. Step 6: Final answer
    x = 100,779.01

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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.