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Finding the Fourth Proportional to 160,513.81, 221,516.24 and 87,921.81

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Solution

The fourth proportional to 160,513.81, 221,516.24 and 87,921.81 is: 121,336.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,513.81 : 221,516.24 = 87,921.81 : x
  2. Step 2: Convert to fraction form
    160,513.81/221,516.24 = 87,921.81/x
  3. Step 3: Cross multiply
    160,513.81x = 221,516.24 × 87,921.81
  4. Step 4: Simplify right side
    160,513.81x = 19,476,108,325.59
  5. Step 5: Solve for x
    x = 19,476,108,325.59/160,513.81
  6. Step 6: Final answer
    x = 121,336.03

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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.