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Finding the Fourth Proportional to 89,905.80, 134,858.70 and 63,640.20

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Solution

The fourth proportional to 89,905.80, 134,858.70 and 63,640.20 is: 95,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,905.80 : 134,858.70 = 63,640.20 : x
  2. Step 2: Convert to fraction form
    89,905.80/134,858.70 = 63,640.20/x
  3. Step 3: Cross multiply
    89,905.80x = 134,858.70 × 63,640.20
  4. Step 4: Simplify right side
    89,905.80x = 8,582,434,639.74
  5. Step 5: Solve for x
    x = 8,582,434,639.74/89,905.80
  6. Step 6: Final answer
    x = 95,460.30

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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.