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Finding the Fourth Proportional to 89,859.20, 134,817.60 and 60,310.40

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Solution

The fourth proportional to 89,859.20, 134,817.60 and 60,310.40 is: 90,484.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,859.20 : 134,817.60 = 60,310.40 : x
  2. Step 2: Convert to fraction form
    89,859.20/134,817.60 = 60,310.40/x
  3. Step 3: Cross multiply
    89,859.20x = 134,817.60 × 60,310.40
  4. Step 4: Simplify right side
    89,859.20x = 8,130,903,383.04
  5. Step 5: Solve for x
    x = 8,130,903,383.04/89,859.20
  6. Step 6: Final answer
    x = 90,484.93

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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.