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Finding the Fourth Proportional to 89,873.40, 134,858.70 and 39,961.20

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Solution

The fourth proportional to 89,873.40, 134,858.70 and 39,961.20 is: 59,963.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,873.40 : 134,858.70 = 39,961.20 : x
  2. Step 2: Convert to fraction form
    89,873.40/134,858.70 = 39,961.20/x
  3. Step 3: Cross multiply
    89,873.40x = 134,858.70 × 39,961.20
  4. Step 4: Simplify right side
    89,873.40x = 5,389,115,482.44
  5. Step 5: Solve for x
    x = 5,389,115,482.44/89,873.40
  6. Step 6: Final answer
    x = 59,963.41

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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.