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Finding the Fourth Proportional to 100,176.56, 138,254.69 and 63,879.34

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Solution

The fourth proportional to 100,176.56, 138,254.69 and 63,879.34 is: 88,160.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,176.56 : 138,254.69 = 63,879.34 : x
  2. Step 2: Convert to fraction form
    100,176.56/138,254.69 = 63,879.34/x
  3. Step 3: Cross multiply
    100,176.56x = 138,254.69 × 63,879.34
  4. Step 4: Simplify right side
    100,176.56x = 8,831,618,349.10
  5. Step 5: Solve for x
    x = 8,831,618,349.10/100,176.56
  6. Step 6: Final answer
    x = 88,160.53

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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.