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Finding the Fourth Proportional to 85,399.92, 128,099.88 and 26,258.58

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Solution

The fourth proportional to 85,399.92, 128,099.88 and 26,258.58 is: 39,387.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,399.92 : 128,099.88 = 26,258.58 : x
  2. Step 2: Convert to fraction form
    85,399.92/128,099.88 = 26,258.58/x
  3. Step 3: Cross multiply
    85,399.92x = 128,099.88 × 26,258.58
  4. Step 4: Simplify right side
    85,399.92x = 3,363,720,946.97
  5. Step 5: Solve for x
    x = 3,363,720,946.97/85,399.92
  6. Step 6: Final answer
    x = 39,387.87

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1.5x scale

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.