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Finding the Fourth Proportional to 85,960.16, 128,940.28 and 26,800.60

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Solution

The fourth proportional to 85,960.16, 128,940.28 and 26,800.60 is: 40,200.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,960.16 : 128,940.28 = 26,800.60 : x
  2. Step 2: Convert to fraction form
    85,960.16/128,940.28 = 26,800.60/x
  3. Step 3: Cross multiply
    85,960.16x = 128,940.28 × 26,800.60
  4. Step 4: Simplify right side
    85,960.16x = 3,455,676,868.17
  5. Step 5: Solve for x
    x = 3,455,676,868.17/85,960.16
  6. Step 6: Final answer
    x = 40,200.91

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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.