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Finding the Fourth Proportional to 100,630.35, 138,869.99 and 55,308.32

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Solution

The fourth proportional to 100,630.35, 138,869.99 and 55,308.32 is: 76,325.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,630.35 : 138,869.99 = 55,308.32 : x
  2. Step 2: Convert to fraction form
    100,630.35/138,869.99 = 55,308.32/x
  3. Step 3: Cross multiply
    100,630.35x = 138,869.99 × 55,308.32
  4. Step 4: Simplify right side
    100,630.35x = 7,680,665,913.70
  5. Step 5: Solve for x
    x = 7,680,665,913.70/100,630.35
  6. Step 6: Final answer
    x = 76,325.54

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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.