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Finding the Fourth Proportional to 89,898.60, 134,847.90 and 58,405.80

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Solution

The fourth proportional to 89,898.60, 134,847.90 and 58,405.80 is: 87,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,898.60 : 134,847.90 = 58,405.80 : x
  2. Step 2: Convert to fraction form
    89,898.60/134,847.90 = 58,405.80/x
  3. Step 3: Cross multiply
    89,898.60x = 134,847.90 × 58,405.80
  4. Step 4: Simplify right side
    89,898.60x = 7,875,899,477.82
  5. Step 5: Solve for x
    x = 7,875,899,477.82/89,898.60
  6. Step 6: Final answer
    x = 87,608.70

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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.