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Finding the Fourth Proportional to 100,445.22, 138,266.46 and 86,826.96

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Solution

The fourth proportional to 100,445.22, 138,266.46 and 86,826.96 is: 119,520.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,445.22 : 138,266.46 = 86,826.96 : x
  2. Step 2: Convert to fraction form
    100,445.22/138,266.46 = 86,826.96/x
  3. Step 3: Cross multiply
    100,445.22x = 138,266.46 × 86,826.96
  4. Step 4: Simplify right side
    100,445.22x = 12,005,256,391.76
  5. Step 5: Solve for x
    x = 12,005,256,391.76/100,445.22
  6. Step 6: Final answer
    x = 119,520.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.