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Finding the Fourth Proportional to 115,671.81, 159,626 and 64,683.96

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Solution

The fourth proportional to 115,671.81, 159,626 and 64,683.96 is: 89,263.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,671.81 : 159,626 = 64,683.96 : x
  2. Step 2: Convert to fraction form
    115,671.81/159,626 = 64,683.96/x
  3. Step 3: Cross multiply
    115,671.81x = 159,626 × 64,683.96
  4. Step 4: Simplify right side
    115,671.81x = 10,325,241,798.96
  5. Step 5: Solve for x
    x = 10,325,241,798.96/115,671.81
  6. Step 6: Final answer
    x = 89,263.25

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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.