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Finding the Fourth Proportional to 89,905.40, 134,825.70 and 45,517.40

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Solution

The fourth proportional to 89,905.40, 134,825.70 and 45,517.40 is: 68,259.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,905.40 : 134,825.70 = 45,517.40 : x
  2. Step 2: Convert to fraction form
    89,905.40/134,825.70 = 45,517.40/x
  3. Step 3: Cross multiply
    89,905.40x = 134,825.70 × 45,517.40
  4. Step 4: Simplify right side
    89,905.40x = 6,136,915,317.18
  5. Step 5: Solve for x
    x = 6,136,915,317.18/89,905.40
  6. Step 6: Final answer
    x = 68,259.70

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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.