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Finding the Fourth Proportional to 156,168.64, 215,513.90 and 84,549.87

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Solution

The fourth proportional to 156,168.64, 215,513.90 and 84,549.87 is: 116,679.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,168.64 : 215,513.90 = 84,549.87 : x
  2. Step 2: Convert to fraction form
    156,168.64/215,513.90 = 84,549.87/x
  3. Step 3: Cross multiply
    156,168.64x = 215,513.90 × 84,549.87
  4. Step 4: Simplify right side
    156,168.64x = 18,221,672,228.19
  5. Step 5: Solve for x
    x = 18,221,672,228.19/156,168.64
  6. Step 6: Final answer
    x = 116,679.46

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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.