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Finding the Fourth Proportional to 109,258.74, 150,819.39 and 85,393.11

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Solution

The fourth proportional to 109,258.74, 150,819.39 and 85,393.11 is: 117,875.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,258.74 : 150,819.39 = 85,393.11 : x
  2. Step 2: Convert to fraction form
    109,258.74/150,819.39 = 85,393.11/x
  3. Step 3: Cross multiply
    109,258.74x = 150,819.39 × 85,393.11
  4. Step 4: Simplify right side
    109,258.74x = 12,878,936,760.40
  5. Step 5: Solve for x
    x = 12,878,936,760.40/109,258.74
  6. Step 6: Final answer
    x = 117,875.57

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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.