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Finding the Fourth Proportional to 64,991.40, 89,688.12 and 35,183.40

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Solution

The fourth proportional to 64,991.40, 89,688.12 and 35,183.40 is: 48,553.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,991.40 : 89,688.12 = 35,183.40 : x
  2. Step 2: Convert to fraction form
    64,991.40/89,688.12 = 35,183.40/x
  3. Step 3: Cross multiply
    64,991.40x = 89,688.12 × 35,183.40
  4. Step 4: Simplify right side
    64,991.40x = 3,155,533,001.21
  5. Step 5: Solve for x
    x = 3,155,533,001.21/64,991.40
  6. Step 6: Final answer
    x = 48,553.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.